HomeMy WebLinkAboutOnCall Traffic-Transportation Engineering_Technical Proposal_AGA EngineersTechnical Proposal
Professional On-Call Traffic and
Transportation Engineering Services
March 17, 2026
211 Imperial Highway, Suite 208, Fullerton, CA 92835 || (714) 992-4592 || aga@agaengineersinc.com
AGA Engineers, Inc.
211 Imperial Highway, Suite 208, Fullerton, CA 92835
(714) 992-4592 Email: aga@agaengineersinc.com
March 17, 2026
Mr. Christian Malpica
Associate Engineer/Project Manager
City of Diamond Bar
Department of Public Works
21810 East Copely Drive
Diamond Bar, California 91765
RE: Proposal to Provide On-Call Traffic and Transportation Engineering Services
Dear Mr. Malpica,
AGA Engineers, Inc. (AGA) is pleased to respond to the City of Diamond Bar’s Request for Proposal (RFP),
dated February 24, 2026, and Addendum No. 1 dated March 16, 2026, to provide for On-Call Traffic and
Transportation Engineering Services to the City. As instructed in the RFP, we are submitting our Technical Proposal
via PlanetBids. Our Fee Proposal is being submitted as a separate file.
We are a full-service traffic engineering consulting firm whose engineering staff has been providing on-call
traffic engineering and field support services to municipalities for nearly 30 years. We currently provide on-call services
to a variety of agencies including Los Angeles County, Orange County Transportation Authority, and the cities of La
Habra, Fountain Valley, Huntington Beach, Costa Mesa, Redondo Beach, Laguna Beach, Highland, Laguna Niguel,
Whittier, and Montclair. We provide signal monitoring support to La Habra, Highland, Laguna Niguel, and Fountain Valley.
Additionally, AGA provides a contract City Traffic Engineer to Victorville and San Dimas.
AGA is a multidiscipline engineering firm specializing in municipal and transportation engineering. We have
the ability to provide all traffic and transportation engineering services the City may need in an expeditious and cost-
effective manner. AGA provides our clients with assistance in the areas of traffic signal design, various types of traffic
studies and analyses, plan checking services, grant application support and project administration, traffic signal and
communications design, ITS design, traffic signal timing and coordination studies, traffic counts and data collection,
and other associated traffic engineering services.
Over the years, engineers at AGA have designed hundreds of new traffic signals, hundreds more traffic
signal modifications to existing traffic signals, retimed thousands of traffic signals, prepared channelization plans and
traffic control plans, ITS plans, and prepared various grant applications for more than a hundred public agency
clients. We have provided traffic engineering construction support as a part of managing the implementation of
projects we have designed, as well as successfully completing a number of design-build traffic engineering projects.
Engineers at AGA have prepared more than 6,500 coordination timing plans for signalized intersections. They have
also completed signing, striping, detour and traffic control plans in support of a variety of traffic signal system and
transportation projects.
Through the utilization of today’s most sophisticated computer-aided equipment by highly skilled and
talented professional engineers and technicians, we are able to provide clients with quality, cost-effective,
professional services in a timely manner. Our success can be attributed to our commitment to providing clients with
personalized, quality service. Our team’s experience with completing small-scale traffic engineering projects ensures
that such projects can be completed on time and within budget with minimal demands placed upon City staff. AGA is
currently under contract with numerous municipal jurisdictions in the region for a variety of projects ranging from on-
site staffing to traffic signal improvement projects, to traffic signal monitoring, to on-call services.
March 17, 2026
Page 2 of 2
In addition, to providing traditional on-call traffic engineering services to municipalities, we are recognized for our considerable expertise in the planning, design, and operation of complex traffic control and ITS systems. Over
the past few years, AGA staff has created synchronized traffic signal timing plans for thousands of traffic signals and arterial corridors in Orange County while working for OCTA as well as most cities in Orange County. We have also
designed and installed various Intelligent Transportation System (ITS) elements including CCTV cameras, fiber optic communication systems, wireless interconnect systems, and upgraded multiple centralized control systems. AGA's engineers and technicians don't just monitor and maintain traffic signal systems and timing. Our staff is trained to
identify traffic control system issues and flow problems and recommend improvements and adjustments accordingly. AGA's key staff members are seasoned professionals who have worked for public agencies which provides
them with a unique understanding of the desires and needs of a city so that we "get it right" the first time. The attached proposal describes the AGA team's traffic, transportation and civil engineering knowledge and background,
highlights our municipal experience, provides agency references, staff resumes, and details our understanding of the
types of traffic engineering services that the City may need. Our engineers and technicians possess all the necessary qualifications and experience to ensure successful
outcomes for the City, be it a simple traffic investigation, a politically charged development project, a multi-agency project, or a complex traffic systems challenge. AGA is not a firm that provides only labor to accomplish designated
tasks; rather, AGA offers a high level of intellectual support to accomplish client objectives. The AGA team's unique
blend of Civil Engineers, Traffic Engineers, and skilled technical field maintenance personnel provides a synergy that typically results in success beyond expectations.
Our designated Project Manager will be Mr. Greg Wong, P.E., Vice President. He will be the primary point
of contact and will remain in charge throughout the contract period. His experience includes street and highway improvement projects, local city projects, private development projects, and Traffic Signal Synchronization Program
(TSSP) projects. He conducts level of service analyses, prepares traffic signal signing/striping plans, prepares detour
plans, conducts plan checking, intersection level of service analyses, signal design and signal modification plans and specifications (PS&E), and intersection improvement plans to upgrade controllers and connect existing fiber for
communication purposes -often in cooperation with Caltrans. Additionally, as a long-time resident of the City Mr. Wong has firsthand knowledge of traffic conditions and is very familiar with its roadways.
AGA guarantees that all contents of this proposal shall be valid for a period of 120 calendar days from the date
of this submittal.
We do not have any objections, exceptions, or reservations to the contractual language or requirements contained in the City's Agreement.
I, Chalap K. Sadam, President of AGA, am the Management Contact. I am duly authorized to negotiate and execute agreements with the City on behalf of the company.
AGA is very excited to work with the City of Diamond Bar. If you have any questions or require clarification
on any aspect of this submittal, please don't hesitate to give me a call at (714) 992-4592.
Respectfully submitted,
ADDENDUM NO. l
DIAMOND BAR C,U.U:ORNU
DEPARTMENT OF PUBLIC WORKS
ADDENDUM NO. 1
Professional On-Call Traffic and Transportation Engineering Services
The following questions and responses to the Request for Proposals (RFP) shall be incorporated into the solicitation documents for the above-referenced Design Consultant SeNices project. This addendum forms part of the Contract Documents and the Consultant shall
sign this page as acknowledgement of receipt of Addendum No. 1 and attach it to the RFP.
avI . 1u, . . Date
Director of Public Works/City Engineer
orized Signature
On-Call Traffic & Transportation Engineering
Page i
Table of Contents
Cover Letter
Addendum No. 1 Acknowledgement
Firm Background ............................................................................................................................................................ 1
Consultant Team ............................................................................................................................................................ 1
Approach & Methodology ............................................................................................................................................... 5
Traffic Engineering Studies .............................................................................................................................. 5
Design/PS&E/Plan Checking ........................................................................................................................... 7
Construction Support ..................................................................................................................................... 10
Transportation Planning/Coordination ........................................................................................................... 10
Traffic Management Systems/Traffic Signal System Operations ................................................................... 12
Meetings/Other Services ............................................................................................................................... 14
Experience & References ............................................................................................................................................ 15
On-Call Traffic & Transportation Engineering
Page 1
Firm Background
AGA Engineers, Inc. (AGA) is a California S Corporation established in 2020
with 16 employees, many of whom have worked together for at least five years and
the executives have worked together since 1993, which is a respectable indication of
the stability and compatibility of our team. All work performed under this contract with
the City will be conducted by employees located at AGA’s offices in Fullerton, CA.
AGA was founded by Mr. Chalap K. Sadam, former Vice President and co-
founder of Albert Grover & Associates, which was founded in 1993. The new company
was formed after the passing of the founder and CEO, Mr. Albert Grover. After
acquiring certain assets from Albert Grover & Associates, and under the leadership of
Mr. Sadam, AGA has retained a similar culture and the practices that made our
transition seamless to all our clients – largely due to retention of our core team of
senior and professional staff who worked under the former company. Our engineers bring more than 30 years of their expertise and
experience to AGA allowing us to continue to successfully work for our clients.
Over the years, engineers at AGA have designed hundreds of new traffic signals, hundreds more traffic signal modifications
to existing traffic signals, retimed thousands of traffic signals, prepared channelization plans and traffic control plans, ITS plans, and
prepared various grant applications for more than a hundred public agency clients. We have provided traffic engineering construction
support as a part of managing the implementation of projects we have designed, as well as successfully completing a number of
design-build traffic engineering projects.
AGA is currently under contract with numerous municipal jurisdictions in the region for a variety of projects ranging from
on-site staffing to traffic signal improvement projects, to traffic signal monitoring, to on-call services. At this time, AGA provides an
on-site City Traffic Engineer for the cities of San Dimas and Victorville. In addition, AGA is on-call and has existing contracts with
Los Angeles County Department of Public Works, Orange County Transportation Authority, and the cities of Costa Mesa, Fountain
Valley, Highland, Huntington Beach, La Habra, Laguna Niguel, Montclair, San Dimas, Vernon, Whittier, and Yorba Linda.
Consultant Team
Our Organization Chart below identifies the AGA Project Team and the tasks they will be assigned to complete. It is followed
by resumes of key personnel. Key staff members will be available for the duration of the entire project and will not be removed or
replaced without prior written authorization from the City.
Contact Information:
AGA Engineers, Inc.
211 Imperial Highway, Suite 208
Fullerton, CA 92835
(714) 992-4592
aga@agaengineersinc.com
DIR #: 1000636813
Website: agaengineersinc.com
On-Call Traffic & Transportation Engineering
Page 2
Greg Wong, PE
Vice President
Mr. Wong, our designated Project Manager, has nearly 30 years of experience
and has completed numerous projects involving state, local, and private agencies —
including Traffic Signal Synchronization Program (TSSP) projects, street and highway
improvement projects, local city projects, and private development projects. His duties
included preparing traffic signal coordination timing plans, traffic signal design, traffic
impact studies and analyses, design and implementation projects, and parking circulation
analyses. He has been a resident of Diamond Bar since 2003 and is very familiar with
the City landscape and traffic patterns.
On-Call Traffic Engineering Support and Traffic Signal Monitoring, La Habra. Mr. Wong serves as the Contract Traffic
Engineer. Tasks he conducts include reviewing proposed development site and circulation plans, traffic signal plans, and traffic
impact studies. He responds to resident concerns regarding parking, red curb/sight distance requests, school traffic, and traffic signal
timing. He attends monthly Traffic Committee Meetings and Design Review Committee (DRC) meetings and monitors day-to-day
traffic signal operations via the City’s Intelight Kinetic central signal system and utilizes the Automated Traffic Signal Performance
Measure (ATSPM) application.
On-Call Traffic Engineering Support and Traffic Signal Monitoring, Fountain Valley. As Project Manager, Mr. Wong
monitors day-to-day traffic signal operations via the City’s QuicNet central system. He responds to residents’ and school staff with
concerns regarding traffic signal timing. He assists City staff in reviewing RTSSP corridor projects in the City that include all signal
timing related tasks.
On-Call Traffic Engineering Services and Traffic Signal Monitoring, Montclair. As Task Leader for Transportation
Planning and Traffic Studies, Mr. Wong both reviews and prepares traffic plans, queuing studies, and traffic signal warrant studies
for proposed development projects. Other tasks include preparing controller timing charts, assisting with grant applications, preparing
and reviewing traffic control plans, and helping city staff with resident comments/complaints.
Los Angeles County Traffic Signal Synchronization Projects (TSSP). The goal of TSSP projects is to improve traffic
conditions and traffic flow through timing plan development, implementation, and fine tuning. Mr. Wong analyzed, provided
recommendations and designs for upgrading traffic signals on 9 corridor projects that included 160 intersections, as well as providing
multijurisdictional signal timing and coordination of signals. The TSSP corridor projects include upgrading traffic signals to the latest
CA MUTCD guidelines, Caltrans standards, ADA requirements and recently upgrading the vehicle detection to the new hybrid
radar/video detection at many of the study intersections.
Chalap K. Sadam, PE, TE
President
Mr. Sadam has performed traffic studies, feasibility studies, safety studies, long-
term roadway improvement studies, and transportation-related Master Plan studies for
countless cities and counties throughout Southern California. He is a recognized expert
of traffic signal communications, Intelligent Transportation Systems, Traffic Management
Centers, centralized traffic signal systems and video management systems. He is well-
known for his studies involving Regional Traffic Signal Synchronization Programs
(RTSSP), working to promote cooperation between Caltrans, county, and cities to
synchronize traffic signals for multiple major corridors in Orange County, Los Angeles
County and the San Bernardino Valley.
On-Call Traffic Engineering Support Services. Mr. Sadam provides project
management and engineering support for the preparation of traffic signal plans,
proposed development circulation plans, reviewing traffic studies, and reviewing signal
timing plans. He supervised tasks including preparation and review of plans, reports, and
Education
University of Southern California –
Master of Business Administration,
2002
Virginia Polytechnic Institute
and State University – Master of
Science, Civil Engineering
(Transportation), 1990
Jawaharlal Nehru Technological
University – Bachelor of Engineer,
Civil Engineering, 1988
Education
University of California, Irvine
Bachelor of Science, Civil
Engineering, 1996
Westech College
Certified Geographical Information
Systems, 1997
On-Call Traffic & Transportation Engineering
Page 3
studies, attending meetings and giving presentations, City staff support, and responding to resident concerns. He provides project
management and engineering support for the Cities of La Habra, Costa Mesa, Lake Forest, Buena Park, and Fullerton.
Regional Traffic Signal Synchronization Program (RTSSP) Projects, OCTA. OCTA developed a signal coordination
plan to optimize traffic flow and travel conditions in Orange County, including the timing plan development, implementation, fine
tuning, and monitoring for all signalized intersections along each arterial project corridor. Tasks included coordination between
agencies, field reviews, developing design plans and signal coordination timing, and monitoring traffic flow. Mr. Sadam served as
Project Manager for 32 corridors.
Traffic Safety Studies:
• Systemic Safety Analysis Report Program for the Cities of Fountain Valley, Placentia, and Redlands.
• Office of Traffic Safety funded citywide safety improvements for the cities of La Habra, Montclair, Palm Springs, Downey
and Inglewood.
• Preparation of Highway Safety Improvement Project (HSIP) grant applications, and design/ implementation of multiple
State funded projects.
• Assisted multiple agencies with successful reimbursements of local, State and Federal grant funds.
Ruben Perales, PE, TE
Vice President
Mr. Perales performs a wide variety of traffic engineering tasks, as well as
providing leadership on many projects. He has been a Project Manager for many traffic
signal design and traffic signal modification projects. He prepares plans for fiber optic
and wireless communication, designs traffic management centers, develops CCTV and
video detection systems, develops traffic detour plans, and conducts plan checking. He
is adept at signal design and modification, fiber optic communications, signal
coordination, signing, striping, and street lighting.
Contract Traffic Engineer, San Dimas. Mr. Perales reviews proposed
development site and circulation plans, traffic signal plans, and traffic impact studies. He
responds to resident concerns regarding parking, red curb/sight distance requests,
school traffic, day-to-day traffic signal monitoring and operations. He currently is a
member of the San Dimas Traffic Safety Committee.
On-Call Traffic Engineering, Laguna Beach. Mr. Perales is the designated Project Manager. He assists the City with a
variety of traffic engineering tasks including traffic studies, speed surveys, traffic calming studies, signing and striping plans, traffic
signal operation reviews, and responding to resident concerns related to traffic and transportation.
Citywide Engineering and Traffic Surveys. The purpose of Engineering and Traffic Surveys (E&TS) is to update the speed
limits on City-selected arterial, collector, and local roadways. The surveys are conducted to ensure that cities comply with existing State
regulations concerning the increasing or decreasing of speed limits within City boundaries. Mr. Perales is Engineer of Record for
updating the E&TS for the cities of Buena Park, Burbank, Costa Mesa, Garden Grove, Gardena, Huntington Beach, Laguna Niguel,
Santa Ana, Santa Clarita, Seal Beach, Westminster, and Yorba Linda. Tasks include reviewing the survey data and accident data
for analysis, driving the roadway segments to review characteristics not apparent to drivers, determining the recommended roadway
segment speed, and reviewing the final report.
HSIP Federal Funded Projects, Huntington Beach. The federal government provides funding to cities to update their
traffic signal infrastructure with safety improvements to reduce traffic fatalities and serious injuries on public roads. Tasks included
preparation of traffic signal modification plans to provide protected left turn phasing. Work included conducting field reviews of project
intersections, traffic signal cabinet inventory to identify equipment required to provide upgrades, and traffic signal communication
plans for communications to adjacent signals. Mr. Perales served as Project Manager for work on the intersections of Goldenwest
St/Heil Ave, Newland St/Ellis Ave, and Newland St/Slater Ave.
Education
California State Polytechnic
University, Pomona – Bachelor of
Science, Civil Engineering, 2005
Professional Registrations
CA Registered Civil Engineer – CE
#83169
CA Registered Traffic Engineer – TE
#2838
On-Call Traffic & Transportation Engineering
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Jessica Reyes, PE
Senior Transportation Engineer II
Ms. Reyes participates in a wide variety of transportation engineering functions
and has worked with government agencies throughout Southern California. Her duties
include designing both new and modified traffic signals, fiber communications, signing
and striping, street lighting, and implementation of both bike lanes and traffic control. She
also prepares plans, specifications and estimates. She conducts sight distance analyses
and traffic signal warrants, along with other field studies such as crossing guard studies,
traffic impact studies, and traffic operations analyses.
Project P Marguerite Parkway Traffic Signal Synchronization Program
(TSSP), Mission Viejo. The goal of this project is to improve safety and traffic flow by developing and implementing signal
synchronization timing and designing improvements to the traffic signal infrastructure. Ms. Reyes is currently preparing traffic signal
improvement plans as well as traffic signal modification design plans.
HSIP Cycle 11 Citywide Traffic Signal Upgrades, Buena Park. This is a grant related project to improve traffic signals
with upgrades to vehicle heads, traffic signal controllers, countdown pedestrian head indications, and signal poles to enhance safety
at the project intersections. Ms. Reyes is currently working on the traffic signal improvements and traffic signal modification plans,
as well as preparing specifications and cost estimates, and preparing the Authorization-to Proceed (E-76) package.
Signal System Design, Signal Modifications, and Bus Stop Improvements, Ontario. The scope of this project includes
improvements at several intersections surrounding a bus stop, as well as improvements to the bus stop. Ms. Reyes is currently
designing the traffic signal modification plans for this multi-stage project.
Artesia Boulevard Safety Enhancements, Redondo Beach. The City decided to convert several intersections to Flashing
Yellow Arrow (FYA) signal phasing, as well as improving sight distance for drivers by making various roadway modifications. Ms.
Reyes conducted topographic surveys to verify the existing conditions of traffic signals, designed traffic signal modifications and
signing and striping plans, and prepared project specifications and cost estimates. She is currently providing support during the bid
and construction phases.
HSIP Cycle 11 Edinger Avenue and Heil Avenue Corridors, Huntington Beach. The project entails safety improvements
to traffic signals such as retroreflective backplates, improvements to roadway markings, changes to pedestrian signal timing, etc.
Ms. Reyes is currently designing signing and striping plans, as well as preparing project specifications and cost estimates.
Phillip Fuentes Senior Signal Systems Specialist
Mr. Fuentes’ technical skills include preventative maintenance and installing
traffic signal equipment. He is responsible for troubleshooting equipment and supervising
contractors during construction of signal and roadway improvement projects. He provides
citywide assessments and inventory of infrastructure and communications. He provides
both onsite and remote support, administration, repair, hardware implementation, and
product maintenance of traffic signal systems for AGA’s clients.
Central Avenue Corridor Traffic Signal Improvements, Montclair. Project
involves preparation and installation of both local and coordination signal timing,
converting existing timing charts to the new controller format, developing traffic signal
modification plans, fiber optic communication plans, and signing and striping plans,
system integration, and construction engineering support.
Holt Boulevard Improvements, Montclair. Project involves intersection level of service analyses, preparation of
coordination signal timing, converting existing timing charts to the new controller format, developing traffic signal modification plans,
developing fiber optic communication plans, providing construction engineering support, and providing system integration.
Education
California State University, Fullerton
Bachelor of Science, Civil
Engineering, 2016
Professional Registrations
CA Registered Civil Engineer – CE
#96452
Education
Signal Technician
IMSA Level III Training and Safety
Professional Registrations
Certified General Electrician (DIR-
NEC) No. 1219960
Contractor’s State License C-10
Electrical #1057389
On-Call Traffic & Transportation Engineering
Page 5
Regional Traffic Signal Synchronization Program (RTSSP) Projects. Tasks include detailed field inventory, traffic signal
system evaluations, preparing local timing (including pedestrian and bicycle timing), implementing, fine-tuning and monitoring the
signal operation for the following projects: Portola Pkwy/Santa Margarita Pkwy, MacArthur Blvd/Talbert Ave, Lake Forest Dr, Alicia
Pkwy, and Orangethorpe Ave/Esperanza Rd
Traffic Signal Synchronization Projects. Tasks included preparation/implementation of improvements to traffic signal
timing. Provided detailed field inventories, prepared local timing (including pedestrian and bicycle timing) and implemented, fine-
tuned and monitored traffic signal operation:
• Huntington Beach: Goldenwest St/Heil Ave, Newland St/Slater Ave, Newland St/Ellis Ave Traffic Signal Modifications
Projects
• Downey: Stewart & Gray Road Fiber-Optic Traffic Signal Communications and Upgrades Project
• Rialto: Protected Left-Turn Signal Phasing Project.
• Indio: Jackson Street, Monroe Street, and Highway 111 projects
• Fountain Valley: Left Turn Phasing at 8 Intersections
Approach & Methodology
Traffic Engineering Studies
Intersection Control Studies
AGA Team members have conducted hundreds of studies for the installation of traffic control devices. Such studies include
traffic signal warrant analyses, traffic signal priority lists, pedestrian crossings, multi-stop application studies, and left-turn studies.
The purpose of these studies is to evaluate the most appropriate control for the intersection in question.
Multi-way stop warrant analysis. The AGA Team is very familiar with the multi-way stop control warrant analysis. The
AGA Team has conducted numerous multi-way stop control analyses throughout the years using the CA MUTCD, Multi-Way Stop
Application. Typically, the collisions at the intersection are reviewed and traffic counts are conducted and evaluated. For many
studies, the number of collisions and side street traffic volumes are less than the requirements and therefore the warrant is not
satisfied. However, many of the requests that an agency receives for all-way stop control are mainly due to sight distance concerns.
Per direction from the City, the multi-way stop control analyses could also include a sight distance analysis. The sight
distance analysis can either involve a stopping sight distance or corner sight distance analyses. The sight distance analyses can
recommend parking restrictions to alleviate any issues regarding sight distance. For any traffic warrant control analysis, field review
of the intersection/area is very important. Understanding traffic patterns, roadway layout/conditions and any obstructions that could
interfere with sight distance may not show up in the data collected for the study.
Traffic signal warrant analysis. The AGA Team has conducted many traffic signal warrant analyses and studies for
agencies throughout Southern California. The analysis utilized the CA MUTCD guidelines for Studies and Factors for Justifying
Traffic Control Signals (Section 4C.01) and all nine warrants, where applicable. AGA collects and carefully evaluates the count and
collision data. Many times, right turning vehicles can be discounted from the count data as vehicles turning right from the side street
have adequate gaps in the main street traffic. For the collision assessment, AGA may also need to review the police report to
determine the exact cause of an accident.
Along with conducting traffic counts and assessing the traffic collisions, AGA will also evaluate the total delay of an approach
during the peak hour. AGA could evaluate the delays using the traffic counts and the Highway Capacity Manual methodology to
determine the average delay of a vehicle or conduct traffic delay surveys to assess the delays for each vehicle. If only vehicle delays
are the criteria that is satisfied for traffic signal control, AGA will also evaluate what the side street delays would be with a traffic
signal. If the proposed traffic signal is to be synchronized with existing signal coordination along a corridor, the side street delay
could be actually higher with the traffic signal due to the traffic signal coordination.
One study that the AGA Team evaluated for traffic signal control, showed that with the existing two-way stop control, the
side street vehicles had morning and evening delays ranging from 19-36 seconds. If the intersection were to be signalized and part
of the traffic signal coordination system (110 second cycle length), the side street delays could be in the 70-90 second range.
Therefore, the installation of a traffic signal would cause even further delays than existing conditions.
If collisions or sight distance is of concern, a sight distance analysis will also be evaluated. In lieu of a traffic signal due to
sight distance, parking restrictions could be recommended. This is a more cost-effective and practical solution than a traffic signal.
On-Call Traffic & Transportation Engineering
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If a traffic signal is determined to be warranted, then an operational analysis will be conducted to determine the traffic signal phasing
and operation (protected left turn phasing, split phase, pedestrian crossings, etc.). A cost estimate will then be conducted. Similar to
the multi-way stop control analysis, a field review will be conducted to provide a better understanding of the intersection. A brief
report summarizing the engineering analysis—both quantitative and qualitative—and providing recommendations as to the most
appropriate traffic control measure for the intersection will be prepared and submitted to the City.
Safety Studies
The AGA Team has conducted numerous traffic safety studies from large citywide studies such as Systemic Safety Analysis
Report Program (SSARP) and Local Roadway Safety Plan (LRSP), to corridor safety studies, intersection safety studies and school
safety-circulation studies. Each study involves a full field review of the site and a review of the accident history. The study could be
for all modes of transportation such as vehicles and trucks, pedestrians, bicyclists and/or transit. Our recommendations for all studies
will be summarized in a Memorandum which is submitted to the city for review.
• For an intersection analysis, the collisions will be assessed to determine if a traffic collision pattern exists, the sight distance
analyzed, determine the proper intersection traffic control or traffic signal phasing/operation, and review of signage and
striping. If the intersection is signalized, review of the traffic signal timing (local signal timing parameters and traffic signal
coordination timing plans) will also be completed.
• For street segments, evaluate the signing and striping, especially lane merging/transitions and areas with horizontal/vertical
curvatures.
• For school areas, it is important to coordinate with school staff, the school district and crossing guards. AGA will evaluate
the circulation of traffic (vehicles, pedestrians and buses) both internally within the school parking lot and externally around
the school.
An example from the City of La Habra is a School Safety
Circulation Study. AGA staff worked with the city, the La Habra City
School District, and Walnut Elementary School to design a new
circulation plan to alleviate excessive vehicle queuing. The queue
would extend from the school to Walnut Street and vehicles travelling
along Walnut Street would then need to drive on the opposite side of
the street to avoid the waiting queue. We assisted with the design of
the new parking lot, helped develop staff duties for pickup/drop off,
coordinated with the crossing guards, and developed the bulb-out
crossing on Walnut Street. During implementation of the plan, AGA
worked with the school’s principal providing assistance to improve
internal traffic flow and additional recommendations.
Trip Generation Studies/Traffic Modeling
Given the potential for growth via commercial redevelopment in the City, assessment of the scope and timing of traffic
infrastructure improvements to adequately serve this increased traffic demand is an ongoing issue. Short term traffic operational
analysis can be combined with long term (10 to 20 years) planning data to evaluate and monitor the impact of urban growth in a
dynamic way. For the long-term planning analysis, AGA will coordinate with Southern California Association of Governments (SCAG)
Sample Intersection Collision Assessment
No.Collision TypeSeverity Direction Time of Day Party at Fault Date
1 Veh-Ped Severe EBL/NBT Dark Auto EBL 11/15/2018 REC: Upgrade Traffic Signal for the following:
2 Veh-Ped Severe WBL/NBT Daylight Auto WBL 3/6/2019
3 Veh-Ped Severe WBL/NBT Dark Auto WBL 10/31/2019
4 Veh-Ped Severe Not Stated Dark Ped 6/11/2020
5 Broadside Severe SBL/NBT Daylight Auto SBL 10/15/2020
6 Veh-Bicycle Fatal NBL/NBT Dusk-Dawn Not Avail 3/16/2021
SB Thru 1 Broadside (8)WB Left 2
WB Thru 3 NB Left 1 EB Left 2
EB Thru 3 SB Left 1 Other 2
No.1 - Main Street at 1st Street
Severe Injury/Fatal Collisions Notes/Recommendations
Notes: Other Predominant Non-Fatal-Severe Collisions
Rear End
(7)
Add protected left turn signal phasing for all movements,
Additional EB/WB through vehicle head indications, Add
dilemma zone detection and red protect zones for red light
running.
Walnut Elementary Safety Circulation Study Site Plan
On-Call Traffic & Transportation Engineering
Page 7
to develop the future traffic volumes. Such analyses are critical for conducting feasibility studies and traffic impact studies/analyses,
and for developing traffic impact sections of EIRs and EISs.
One way to address potential growth in a successfully proactive
manner was developed and implemented by the AGA Team in the City of
Fullerton. Based on the General Plan build-out conditions, we determined the
ultimate transportation infrastructure needs. In effect, a Citywide Traffic Impact
Analysis was developed, including calculation of overall costs to construct the
required improvements. As development projects were proposed, AGA
conducted individual Traffic Impact Analyses to more definitively determine the
appropriate scheduling for implementation of such improvements. This traffic
modeling and monitoring service is of tremendous long-term benefit.
A successful project the AGA Team conducted was the Citywide Traffic
Analysis for the City of Torrance which evaluated both existing and future traffic
conditions (level-of-service analyses), existing traffic signal infrastructure, and
provided a citywide safety review aimed at improving traffic signal efficiency and
resiliency, enhancing roadway safety, and mitigating both existing and project
traffic congestion within the city. The report proposed near-term and long-term
intersection improvements (with conceptual plans), included an extensive
infrastructure plan covering traffic equipment improvements, and a traffic signal
communications plan which included fiber optic upgrades.
Engineering and Traffic Surveys
The objective of Engineering and Traffic Surveys (speed surveys) is to review the existing speed limits and recommend
changes to the speed limits (increase or decrease) in accordance with the requirements of the latest edition Section 627 of the
California Vehicle Code (CVC). The purpose of these surveys is to provide sufficient information to document that the conditions of
Section 627 have been satisfied and that other conditions not readily apparent to a motorist are properly identified. The recently
adopted Assembly Bill No. 43 (AB43) amended and added sections to the CVC related to traffic safety and speed limits.
AGA staff have completed speed survey projects for the following cities: Buena Park, Burbank, Costa Mesa, Fountain Valley,
Garden Grove, Gardena, Huntington Beach, Laguan Beach, Laguna Niguel, Redondo Beach, Santa Ana, Santa Clarita, Seal Beach,
Tustin, Westminster, Whittier, and Yorba Linda.
Design/PS&E/Plan Checking
Traffic Design Plans
AGA staff have developed and reviewed numerous traffic signal designs, traffic control plans, signing and striping plans,
Intelligent Transportation System (ITS) plans, and communication plans for a large number of cities. While completing traffic signal
designs, our staff not only looks at the specific improvements identified, but also conducts inventories of all the traffic signal
components which may need to be modified or upgraded.
PS&E for Traffic Signal Design and Modifications. Our experience with designing traffic signals, and our drive to keep
up with the latest requirements of the CA MUTCD, Caltrans Standards, and the American Association of State Highway and
Transportation Officials (AASHTO) Greenbook allows us to provide a comprehensive design for successful completion of a project.
AGA staff are also up-to-date with current ADA requirements. Design activities consist of determining all aspects of right-of-way
requirements for street improvements including providing raised median configurations, left and right turn pocket lengths, speed-
controlled transitions, lane drops, etc.
The proposed detailed scope of work for preparation of plans, specifications, and estimates (PS&E) for all signal timing
system related improvements is as follows:
• Attend a preliminary design meeting to discuss and review any specific construction requirements relative to the proposed
improvements. During this meeting, improvements which may have already been constructed as part of other projects or
which may no longer be required will be discussed to avoid completing any duplication of unnecessary design work.
• Collect and review all documents provided by the city which are necessary to complete the work (traffic signal plans, traffic
Crenshaw Blvd/Pacific Coast Hwy, Torrance
Proposed Improvements
On-Call Traffic & Transportation Engineering
Page 8
signal interconnect plans, utility plans, street improvement/roadway plans, etc.).
• Research and record all existing improvements.
• Coordinate with Southern California Edison (SCE) for electrical service upgrades. It is critical to coordinate earlier with SCE
at the onset of the project to allow sufficient time for SCE to prepare the necessary drawings. Current lead times to apply
for and obtain SCE’s approved drawings are ranging anywhere from 4 to 6 months.
• Prepare and submit preliminary construction plans (80% completion level) and construction cost estimates.
• Submit an outline draft of the project specifications. Plan sheets will be prepared at 1” = 40’ (or other scale when deemed
appropriate). All plans will be prepared and submitted in AutoCAD format. The plan set will include a title sheet, traffic signal
and communication plan sheets, a communication network plan sheet, and a fiber assignments plan sheet (as needed).
Detailed illustrations will be utilized for the communication network plan sheet. Specifications will be based on pro forma
specifications provided by the City, revised and supplemented as needed.
• Prepare final plans (100% completion level) incorporating comments from the City and utility companies, specifications,
and engineer’s estimate of probable construction costs.
• Provide an updated project schedule.
Upon approval of the plans and specifications, we will provide final construction drawings in digital format and one set of
mylars. All drawings will be prepared on 24”x 36” mylar sheets, signed and sealed by a California licensed Civil and Traffic Engineer.
We will submit copies of design calculations and pertinent correspondence, including responses from utilities and affected agencies,
as needed.
ITS Design Plans. For many years, AGA has been continuously under contract with county and municipal transportation
agencies, completing various types of signal synchronization
projects. We conducted the San Bernardino Valley
Coordinated Traffic Signal System (SBVCTSS) under the
San Bernardino County Transportation Authority (SBCTA
formerly SANBAG). This project facilitated signal
coordination across jurisdictional boundaries (14 cities, the
County and Caltrans) throughout the San Bernardino Valley
transportation corridors through a tiered approach. The
Foothill Boulevard, Haven Avenue and Base Line Road
corridors within Rancho Cucamonga were included as part
of Tier II. The figure summarizes the signals optimized and
synchronized by AGA for the SBVCTSS.
Since that time, we have provided coordinated signal timing of OCTA
Regional Traffic Signal Synchronization Program (RTSSP) projects for over 28
Orange County agencies and over 1,250 signals on 37 arterial corridors throughout
Orange County, both under the leadership of OCTA and administered by the cities
directly. It is important to note that these projects were often conducted concurrently
with other projects of the same nature and usually in coordination with Caltrans,
indicating the competency and capacity of our excellent team. A partial listing of
recent RTSSP projects which AGA completed in the area includes the following:
• Alicia Parkway (Mission Viejo, Laguna Hills, Aliso Viejo, Laguna Niguel,
Caltrans)
• La Paz Road (Mission Viejo, Laguna Hills, Aliso Viejo, Laguna Niguel,
Caltrans)
• Bolsa Avenue/First Street (Westminster, Santa Ana, Tustin, Caltrans)
• Tustin Avenue/Rose Drive Corridor (Placentia, Anaheim, Orange, Santa
Ana, Caltrans)
• Adams Avenue (Huntington Beach, Costa Mesa, Caltrans)
• Antonio Parkway (Rancho Santa Margarita, County of Orange, Caltrans)
• Lake Forest Drive (Lake Forest, Irvine, Laguna Hills, Caltrans)
• MacArthur Boulevard/Talbert Avenue (Santa Ana, Fountain Valley, Huntington Beach)
SBCTA Tier I and Tier II Corridors
Orange County Corridors
On-Call Traffic & Transportation Engineering
Page 9
The purpose of the projects was to develop a signal coordination plan to optimize traffic flow and travel conditions, including
timing plan development, implementation, fine-tuning, and monitoring. The projects consisted of preparation of traffic signal
modification plans and traffic signal communication plans for installation of new fiber optic communication ITS systems including
CCTV cameras, video detection systems, which were integrated with the respective Traffic Management Centers.
Signing and Striping Plans. The AGA Team has prepared signing and striping plans for many of our client cities. Tasks
involve conducting a field review to evaluate existing conditions then preparing a 40-scale drawing showing both existing and
proposed signing and striping. Modifications might include dual left turn lanes, cat-tracking through the intersection for left turns,
removal of a crosswalk, green conflict zones for bicyclists, etc.
Review Standard Details. AGA actively strives to keep up-to-date with the latest state and federal standards to ensure all
requirements are being met when completing traffic-related designs. AGA’s extensive experience working with a multitude of
agencies throughout Southern California has allowed our team to review and work with various standard drawings. Throughout the
years we have seen several updates to standard drawings such as revised curb ramp design standards (8.33% vs. 7.5% slopes),
updates to traffic signal pole and foundation dimensions, etc. This experience will be invaluable in assisting a city with development
of its own standard drawings and details. When developing standard plans, it is important that all applicable state and federal
standards, such as the CA MUTCD, Caltrans Standard Plans and Revised Standard Plans, Americans with Disabilities Act (ADA)
Standards, and the Standard Plans for Public Works Construction, to name a few, be considered to ensure a city is in compliance
with all mandated requirements.
Detour and Temporary Traffic Control Plans. AGA staff have extensive experience with both developing and reviewing
traffic control plans, and we fully comprehend the details found in the WATCHBOOK. Our Engineers don’t just review such plans
from a technical perspective, but also consider the context in which the lane and street closures are to be implemented, as well as
the traffic characteristics and patterns in the area. Routinely, such reviews involve a site visit to ensure that the design considers all
aspects of transportation including pedestrians, bicyclists, transit, motorists, traffic signals, land use, private property access, etc.
Review of Land Development Projects
Reviewing land development projects cannot be done from the office by junior level staff alone. It is our senior level staff
who have many years of experience with reviewing development projects of all types and sizes. They have the expertise and
experience to know what to be concerned about and what is inconsequential when it comes to traffic operations related to new
development. The review requires hands-on evaluation of street conditions and detailed discussions with developers about the
operational characteristics of the proposed development by experienced engineers who have been involved in reviewing and
negotiating development projects from both the municipal and private side of the equation. We understand the importance of
evaluating the internal circulation and ingress/egress of a site plan. We can identify if there will be any potential traffic (vehicles,
pedestrians and bicyclists) related impact due to a project.
Below are some tasks AGA will conduct when reviewing traffic studies, site plans, and parking studies for land
developments:
• With the new addition of CEQA’s Vehicles Miles Traveled (VMT), AGA will assist city staff with the review for initial VMT
screening to determine if a traffic impact analysis (TIA) is required per the City’s TIA guidelines. If a project is expected to
have VMT impacts, AGA will closely evaluate the feasibility of the proposed VMT mitigations.
• If applicable, AGA will coordinate with city staff in evaluating the proposed study intersections, trip generation via Institute
of Transportation Engineers (ITE) Trip Generation Manual (11th Edition), traffic count data, Level-of-Service (LOS) analysis
and potential improvements.
• AGA will evaluate the project site plan, ingress/egress movements along the local roadway(s), and the internal circulation.
If there is truck traffic expected for the project, it is important to evaluate where and how the trucks enter and exit the project
site. Depending on the roadway (curvature of road and curb lane width), typically a 45-50 foot curb radius is required for a
large truck (WB-67) to enter/exit a driveway. As part of a study’s initial scope of work review, AGA will ensure that all relevant
turning templates will be included.
• AGA will assist city staff with preparation for Planning and/or Council meetings for presentation of a project. This includes
attending both the preparation meeting with the project consultant and the actual city meeting.
On-Call Traffic & Transportation Engineering
Page 10
One example of how AGA works closely with a city to evaluate land
developments is the Lambert Road In-N-Out Proposed Site Plan in La Habra.
Drive-through queuing storage is vital to a fast-food restaurant and is often the
critical element for project approval. For several years there were queuing
problems from the In-N-Out drive-through queue which would extend onto
Lambert Road and block traffic at the intersection of Lambert Road at Palm
Street. AGA worked with both the City and In-N-Out to develop a new site plan
that significantly improved the drive-through capacity and internal circulation.
The final approved plan increased the drive-through capacity by 14-15 vehicles.
AGA is also familiar with reviewing different parking studies from stand-
alone projects to shared parking analyses. If a project does not provide sufficient
parking per a city’s Parking Code, AGA will assist the City with conducting a
parking study that evaluates at least three similar existing sites. We understand the parking situation for business areas within a city
and can quickly validate if the project will have parking impacts to the surrounding area.
Construction Support
The AGA Team has provided traffic engineering construction support to enable timely completion of all construction
components for traffic engineering projects. Following are some services we can provide:
• Assist city and contractors with providing public construction notices to keep the businesses, residents and neighborhoods
informed of project status and any impacts to motorists.
• Prepare for and conduct the pre-construction meeting with the city, contractor, and affected utility owners. Meeting minutes
are prepared and distributed to all meeting attendees.
• Track and review all construction submittals, Requests for Information (RFIs), Request for Changes (RFCs), Contract
Change Orders (CCOs), construction schedule, etc.
• Coordinate construction observations with city staff.
• Review construction schedule and ensure contractor is adhering to it.
• Review and recommend approval of contractor’s progress payment invoices.
• Conduct regular meetings to discuss project status, as necessary.
• Prior to completion of construction, prepare punch list and coordinate with contractor to complete all outstanding items in a
timely manner.
The AGA Team also provides overall system integration efforts which includes coordination with the construction contractor
responsible for installing new traffic signal controllers and cabinets, communication hardware (cables, switches, Ethernet radios,
etc.), Emergency Vehicle Preemption, video detection systems, CCTV cameras, etc. AGA will work hand-in-hand with the contractor
in configuring all Internet Protocol (IP) devices installed as part of the different projects.
Transportation Planning/Coordination
AGA offers local and regional area transportation planning capabilities to develop specific circulation plans, general
circulation plans and coordination of these plans with those developed by metropolitan planning organizations. Microcomputer based
transportation planning models developed in-house, in conjunction with regional socio-economic and transportation models, are
utilized for these planning activities. The recommendations from the Transportation Planning efforts can provide input into the
development of the City’s Capital Improvement Program (CIP) projects.
The AGA Team will provide support for the City’s Transportation System Planning with grade separation projects, transit
studies, SR-57 and SR-60 freeway related projects, etc. AGA staff is well aware of SR-57/SR-60 Confluence project that is currently
being constructed. It is very important that there is constant coordination between, Caltrans, City of Industry and the City, to plan
ahead of the significant closures of the freeway and to adjust the detour and signal timing plans accordingly.
Given the potential for growth in both residential and commercial development and redevelopment in the City, assessment
of the scope and timing of required transportation infrastructure improvements to adequately serve this increased traffic demand is
an ongoing issue. Short term traffic operational analysis can thus be combined with long term (10 to 20 years) transportation planning
data to evaluate and monitor the impact of the urban growth in a dynamic way. Such analyses are critical for conducting various
feasibility studies and traffic impact studies/analyses, and for developing traffic and transportation impact sections of EIRs and EISs.
In-N-Out Final Site Plan
On-Call Traffic & Transportation Engineering
Page 11
One way to address this in a successfully proactive manner was developed and implemented by the AGA team in the City
of Fullerton. Based on General Plan build-out conditions, the AGA team determined ultimate transportation infrastructure needs. In
effect, a Citywide Traffic Impact Analysis was developed, including calculation of overall costs to construct the required
improvements. As development projects were proposed, AGA conducted individual Traffic Impact Analyses to more definitively
determine the appropriate scheduling for implementation of such improvements. This traffic modeling and monitoring service is of
tremendous long-term benefit.
AGA staff worked on the I-405 Freeway Improvement Project
Study Report with Orange County Transportation Authority (OCTA) and
Caltrans. The project study provided mitigations to add capacity, reduce
congestion, enhance interchange operations, maximize throughput and
enhance safety throughout the I-405 corridor in Orange County. Three
alternatives were evaluated as part of the project which included
additional general purpose lanes, an addition of tolled express lanes,
additional auxiliary lanes, freeway ramp and interchange
improvements, and improvements to nearby arterial street
intersections. Each alternative evaluated existing traffic conditions and
forecast 2040 traffic volumes. The $2.08 billion dollar project is currently
completed.
The AGA Team conducted the City of Torrance Citywide
Traffic Analysis which evaluated existing and future traffic conditions
(Level-of-Service analyses), existing traffic signal infrastructure and
provided a citywide safety review aimed at improving traffic signal
efficiency and resiliency, enhancing roadway safety, and mitigating
both existing and project traffic congestion within the City of Torrance.
The report included proposed near-term and long-term intersection
improvements (with conceptual plans), an extensive infrastructure plan
covering traffic equipment improvements and a traffic communications
plan which included fiber optic upgrades.
Poorly conceived projects without the right supporting
infrastructure can create operational problems and increased costs for
a City for years to come. We at AGA understand the importance of
getting projects and infrastructure improvements right the first time
because we know that it is very costly to take corrective action after the
fact. It is our senior level staff with more than a hundred years of
experience reviewing development projects of all types and sizes that
have the expertise to know what to be concerned about and what is
inconsequential when it comes to traffic operations related to new
development. Review of land development projects cannot be done from the office alone by junior level staff, it requires hands on
review of street conditions and detailed discussions with developers about the operational characteristics of the proposed
development by experienced engineers that have been involved in reviewing and negotiating development projects from both the
municipal and private side of the equation. We understand the importance of evaluating the internal circulation and ingress/egress of
a site plan and are very familiar with the street network of the City and can identify if there will be any potential traffic (vehicles,
pedestrians and bicyclists) related impact due to a project. AGA also fully understands where important intersection improvements
are required and will recommend to the City that the project applicant provide the improvement(s) and/or necessary right-of-way. It is
this experience of our staff that is the AGA difference.
A key objective of AGA’s provision of engineering services to the City will be to foster a can-do spirt when working with
developers and agency partners on regionally significant projects. We are more than just technically proficient; we are able to
collaborate with the City’s development team and regional agencies to create win-win solutions so that intelligent business growth
and transportation improvement projects can move forward successfully. We understand that delicate balance of how transportation
interacts with business and we have successfully assisted other municipal clients in Los Angeles, Orange, San Bernardino, and
Riverside counties to embrace the needs of modern business.
Torrance Citywide Traffic Study – Crenshaw Blvd at
Pacific Coast Hwy, Proposed Improvements
I-405 Improvement Project Study Area
On-Call Traffic & Transportation Engineering
Page 12
Traffic Management Systems/Traffic Signal System Operations
We fully understand the importance of operating and monitoring the City’s traffic control system, and our staff have provided
these services to the City for the past 4 years. AGA is currently under contract with the cities of Fountain Valley, Highland, La Habra,
Laguna Niguel, and Montclair to conduct many tasks similar to or identical with those described in this RFP. Based on the required
work and on the experience we have gained while performing those services for the City, we feel that our most important qualifications
relate to problem solving, communication, and a willingness to develop alternative solutions while maintaining public safety. These
qualifications have evolved from a combination of private sector experience and public employment at various agencies.
Traffic Signal Timing and System Support
Developing, implementing, and maintaining signal timing plans are all critical to optimizing the efficiency of the existing
infrastructure, thus ensuring that coordination signal timing plans are operating as designed. Since traffic patterns change when
construction, incidents, and/or new land use development occurs, adjustments to timing plans are often required. Only by frequent
monitoring of traffic operations can these signal timing plans be kept current. In addition to AGA’s expert traffic engineering staff, the
company also employs several experienced traffic signal technicians who are highly skilled and well versed on all types of traffic
signal control hardware and systems, video equipment and control systems, communications, networking, and security systems.
We often respond to citizen complaints. A recent example is from the City
of Laguna Niguel regarding delays on Rancho Niguel Road. On the day we received
the complaint from City staff, we developed a new traffic signal coordination plan
and implemented it the following morning. The new plan was integrated with the
existing coordination timing plan on Crown Valley Parkway (see adjacent figure). All
locations were offline, so AGA staff implemented and fine-turned the new signal
timings in the field. The signal timing adjustments were verified in the field by AGA
staff to ensure that the appropriate changes were effective.
AGA staff are very familiar with the daily traffic patterns and challenges.
There is very heavy traffic demand that bypass the adjacent freeways and use
Grand Avenue, Diamond Bar Boulevard and Golden Springs Drive. Much of the
traffic demand occurs during the morning and evening commuter time periods and
the other time periods involve mainly local traffic within the City. During these off-
peak periods, the signal timing plans from the City’s Transcore Central System
should be set to minimize the delays and only have longer cycle lengths when and
where needed. The traffic signals near the school areas need to be properly
synchronized for both ingress and egress traffic, which may require additional signal
timing plans. Since school traffic is typically consistent throughout the school year,
AGA has developed signal timing plans for agencies that incorporate different set of
split timings for both the morning and afternoon and ingress/egress traffic patterns.
Traffic Signal Operations. AGA operates traffic signal systems for various governmental agencies and does so remotely
from our Fullerton office, which includes a Traffic Management Center (TMC). Existing systems include 31 signals on an Q-Free
Kinetic System in La Habra, 40 signals on a SWARCO (McCain) Transparity system in Montclair, 78 signals using the Econolite
Centracs system in Laguna Niguel, 50 signals on a Q-Free MaxView system in the City of Fountain Valley and 38 signals on a
SWARCO QuicNet system in the City of Highland. Additionally, AGA staff provides as-needed traffic signal system support for the
cities of Placentia and Yorba Linda.
One signal timing project involved approximately 650 intersections spread throughout 17 agencies (15 cities, the County,
and Caltrans) in the San Bernardino Valley under a multi-year contract with San Bernardino County Transportation Authority (SBCTA,
formerly SANBAG). This unique “hands-on” signal experience allowed AGA staff to possess a very realistic understanding of what
it takes to adequately serve the public while maintaining political harmony. Our TMC staff also includes signal system specialists
with previous field maintenance experience with a local Signal Maintenance Contractor. Our unique staffing often allows us to correct
problems before the public starts making complaint phone calls.
Traffic Signal Management. Traffic Signal Synchronization Programs (TSSP) significantly enhance field communications,
upgrade controllers, video detection, and traffic signal timing along the corridor; however, without active oversight and management
by the agencies that are operationally responsible, the true effectiveness of the systems will not be realized. Given the variety of
New Rancho Niguel Rd/Greenfield Dr
Coordination Plan
On-Call Traffic & Transportation Engineering
Page 13
central signal systems, controllers and the different communication systems, integration of these systems requires extensive
knowledge and expertise. Our staff has in-depth knowledge and experience with integrating, maintaining, and supporting the various
signal systems. AGA’s experience from previous projects has shown that special attention must be given to:
• Interface modems from wireless to interconnect components such as hardwire, fiber optic, telephone drops, etc.
• Communication speed differences for different interconnect and controller types.
• Actuating coordination for differing local controller programs and software versions.
• System controller grouping limitations.
• Local software limitations.
• Using a variety of timing parameters and strategies to achieve shorter cycle lengths.
Our experience with integrating central system hardware (computer servers, workstations, Ethernet switches, modems,
port servers, GPS servers) and field elements – including interfacing with traffic signal system vendors, communication systems
specialists and respective agency Information Technology staff – is key to project success.
Traffic Signal Interconnect and Communication. AGA staff have worked on a multitude of traffic signal communication
projects. The AGA Team has also designed several miles of fiber optic communications in the cities of Anaheim, Buena Park, Costa
Mesa, Brea, Irvine, Rancho Cucamonga, Fountain Valley, Fullerton, and La Habra, to name a few. Our designs include ITS
components such as CCTV cameras and Bluetooth travel time devices. Detailed fiber assignments are also included to ensure that
agencies have accurate documentation of their fiber assets in order to facilitate integration of the communication and ITS devices
into the respective traffic management centers.
Special Event, Holiday, and Weekend Signal Timing Changes. Our team has developed and implemented special signal
timing plans for several cities. We have developed special timing plans for the La Habra Citrus Fair (closure of La Habra Boulevard),
Laguna Niguel Holiday Parade (closure of Crown Valley Parkway), along with the Fountain Valley nine month closure of the
intersection of Ellis Avenue/Bushard Street for the Bushard Trunk Sewer Rehabilitation Project As part of AGA’s scope and at the
request of the City, signal timing plans will be developed and implemented during special events at the Diamond Bar Center and at
shopping areas during the holiday shopping season. The timing plans include any crossing arterials impacted by weekend and
holiday traffic. Timing plans will be developed to accommodate the peak ingress and egress traffic movements and a balanced plan
to accommodate both during the middle of the day. Traffic counts at selected locations may also be collected to identify traffic patterns
during the holiday shopping season if requested by the City.
AGA staff also has experience for non-planned events, such as street closures due to water main breaks (City of La Habra-
Lambert Road, City of La Habra-Imperial Highway detour), and the Laguna Niguel Costal fire on May 11, 2022. For the Laguna
Niguel fire, the traffic signal timing was adjusted to provide emergency inbound access to the community in one area and to improve
the egress movement for residents leaving the community in another area. The traffic on the City’s streets is often impacted by
collisions on either the SR-60 and/or SR-57 freeways. The City’s Transcore Central System should be continually assessed on how
well it makes adjustments to the signal timing plans during a non-planned event. Refinements and new signal timing plans should
be developed to better handle future non-planned events.
Traffic Signal Timing Chart Development and Review
AGA staff has prepared a multitude of traffic signal timing charts throughout Southern California. The key to preparing traffic
signal timing is understanding the latest requirements from the CA MUTCD. When the City requests a review of timing charts, the
following will be completed:
Task A
o Calculate the Flashing Don’t Walk times utilizing 3.5 ft/s walking speed and the measurement per CA MUTCD Section
4E.06. All measurements will be conducted in the field.
o The yellow times will be evaluated based on the CA MUTCD Section 4D.26 and will utilize available speed data from the
City. The CA MUTCD states to utilize the 85th percentile speed if available. If no speed data is available for a certain
movement, the “posted speed limit plus 7” calculation is to be utilized. The calculated value will then be rounded up to the
nearest half second (0.5).
Task B
o Calculating bicycle timing involves using Google Earth to measure each through and left-turn movement. This timing will
be utilized to update the Minimum Green time for each intersection. The bicycle timing could also have an impact on the
signal coordination timing, especially for the left turn split timings. The signal coordination timing will need to be reviewed
to see if the coordination timing plan can accommodate the bicycle timing and if changes need to be made.
On-Call Traffic & Transportation Engineering
Page 14
o Calculate the vehicle extension timing for the advance detection. This involves measuring the distance from the stop
bar/crosswalk to the advance detection. Not all approaches (ones without advance detection) will need this evaluation as
this only applies to the advance detection.
Signal Timing Related System Improvements
AGA has worked on a multitude of traffic signal design projects. During the past several years, AGA staff have completed
designs for various Highway Safety Improvement Project (HSIP) and Regional Traffic Signal Synchronization Program (RTSSP)
projects and other grant funded projects to upgrade outdated traffic signal equipment and implement various safety improvements
identified by citywide safety assessments. While completing traffic signal modification designs, AGA staff not only looks at the specific
improvements identified in the RFQ, but also all the traffic signal components that may need to be modified or upgraded.
Video/Radar Detection Systems. AGA has designed a vast amount of traffic signal equipment improvement plans where
new video detection systems have been successfully installed. Our experience and familiarity with different types of video detection
systems such as the Iteris Vantage Vector Hybrid system (utilized for advanced dilemma zone detection), Vantage Next system,
Vantage Edge II system, the Econolite Autoscope Vision system, and Gridsmart have given us the knowledge to successfully design
for the installation of such systems. Understanding these different detection systems and their components allows us to prepare a
thorough design that will meet the project objectives.
As an example, knowing what type of cable is required for the different types of detection systems is critical in determining
if new conduits will be needed or if the cable can be installed in existing conduit. Some systems utilize a single CAT-5E Ethernet
cable for power and video, while others require both separate power and coaxial cables for the video requiring more space in the
conduit. Fully understanding how these systems work and getting the design right is what saves time and costs during construction.
CCTV Cameras. Our designs for hundreds of CCTV camera installations have given us the experience and understanding
of factors to consider when completing such designs. It is important to understand design elements such as location of the camera,
distance between the camera from the communications switch (to identify whether an Ethernet extender or special long-range CAT-
6 cable is required), and existing conduit fill to make sure CCTV cable can be installed. Staying current on new technology is also
very important and it’s something that we are constantly working on. Our experience with designing CCTV systems from multiple
vendors such as Bosch, Cohu, and Axis will be key in providing the project agencies what they are looking for. The AGA team
recently worked on integrating a Cloud-based video management system complete with Firewall security for the City of San Dimas.
Automated Traffic Signal Performance Measures (ATSPM). AGA staff are very familiar with working on the Automated
Traffic Signal Performance Measures (ATSPM) applications for different systems. We have configured the Econolite Centracs, Iteris
SPM, and Q-Free ATSPM applications. In order to obtain accurate ATSPM reporting, it is critical that users accurately configure the
detection (lane-by-lane detection, detector channels, detector type and detector distances). The ATSPM reporting can provide
guidance on where detection is not working properly, the health of the coordinated system, count data (existing and historical), side
street delays and split timing monitoring. The main benefit is that the data is being continuously evaluated and monitored 24/7.
Meetings/Other Services
City Meetings. The AGA project team will make themselves available for meetings to address specific issues or concerns
regarding the projects we are assigned. We are very conscious of the demands on staff time and will make every attempt to maximize
meeting efficiency and minimize the need for repeated discussions or additional meetings on topics that could be addressed directly.
If needed, we will prepare agendas and minutes before/after all meetings which will be provided to all meeting attendees.
AGA will assist city staff with preparation for Planning and/or Council meetings for presentation of a project. This includes
attending both the preparation meeting with the project consultant and the actual city meeting.
Staff Augmentation. AGA staff’s extensive municipal experience as both agency employees and as contract City Traffic
Engineers has been invaluable in helping our staff quickly and efficiently identify and meet the needs and desires of cities across
Southern California. Understanding the basic concerns and constraints – as viewed from the City’s perspective – is a key
qualification. We have long represented many cities at various state and regional transportation functions, meetings, workshops,
seminars, etc., and have helped establish both operational and Capital Improvement Program (CIP) budgets. Staying abreast of the
latest policy activities at both the state and federal levels is an important aspect of attracting grant funding and developing successful
local programs, policies, and procedures.
Quality Assurance/Quality Control Program. An effective quality assurance/quality control (QA/QC) review will minimize
or eliminate additional costs to the City related to reengineering or contractor claims during construction and liability after project
On-Call Traffic & Transportation Engineering
Page 15
completion. Delivering a quality product that is right the first time is the primary focus of AGA’s comprehensive QA/QC process. It is
an integral part of our regular engineering design and study processes and the delivery of every investigation, study, report, or
document we produce. This added layer of independent work product review will be conducted at no additional cost to the City.
Our QA/QC program requires that all deliverables leaving our office be reviewed prior to submittal to the client. All personnel
performing work on this project are responsible to ensure its implementation. We have the philosophy that QA/QC is a continuous
process to be utilized on plan preparation from conceptual design to final PS&E, as well as when conducting various other
professional engineering tasks. Our technical staff is trained to always review work products prior to finalization. Our experienced
QC Manager, will conduct an objective review of the work product. When several disciplines are involved in a project, the QC
Manager may also seek review assistance from other individuals specializing in those disciplines to verify that all project concepts
are being met and all constructability issues are addressed prior to delivery of the project.
Experience & References
On-Call Traffic Engineering Services - Transportation Planning, Signal Monitoring, Grant Assistance
Mr. Andrew Luna, Senior Civil Engineer
City of La Habra
110 E La Habra Blvd, La Habra, CA 90631
(562) 383-4156 || aluna@lahabraca.gov
The AGA Team has been providing on-call traffic engineering and transportation planning services to the City since 1993.
Services provided include presentations at Traffic Commission, Planning Commission and City Council meetings; traffic signal
warrant analyses and subsequent traffic signal designs; residential and school traffic studies; traffic impact analyses; development
of press releases and videos for local cable television relative to various traffic engineering issues; preparing grant applications;
representation at regional governmental meetings; contract administration and construction management.
AGA is under contract to monitor and operate the City’s traffic signal control system from the TMC in our offices.
As-Needed Design Services
Mr. Temo Galvez, Deputy Director of Public Works/City Engineer
City of Fountain Valley
10200 Slater Ave, Fountain Valley, CA 92708
(714) 593-4517 || temo.galvez@fountainvalley.org
Since 1995, the AGA Team provides development, implementation and fine-tuning of weekday and weekend coordination
traffic signal timing plans citywide, signal warrant analyses, speed surveys and developing recommendations for raising/lowering
speed limits, designing new and modified signal installations, and interagency coordination with adjacent cities and Caltrans. Most
recently, AGA completed a Citywide Emergency Vehicle Preemption Study, a federally funded Citywide SSARP project, and we
recently completed a HSIP grant-funded project for traffic signal modifications of eight city signals.
The AGA Team also assists the City with monitoring their traffic signal system.
On-Call Traffic Engineering Services
Mr. Regino de Avila, Civil Engineering Associate
City of Whittier
13230 Penn St, Whittier, CA 90602
(562) 567-9526 || rdeavila@cityofwhittier.org
Various tasks AGA has conducted for the City include assisting with grant applications, preparing traffic signal plans,
conducting traffic signal warrant analyses, preparing signing and striping plans, conducting multi-way stop warrant analyses,
conducting Level of Service analyses, conducting a Citywide Engineering & Traffic Survey, conducting traffic impact studies,
conducting sight distance reviews, reviewing street lighting plans, preparing and reviewing local traffic signal timing plans, reviewing
developer plans, and other traffic engineering tasks.
Before obtaining an on-call contract in 2023, we prepared traffic control plans and developed as-built plans for traffic signal
modifications conducted at three intersections.