HomeMy WebLinkAboutLCI_Proposal for On-Call Traffic and Transportation Engineering Services City of Diamond BarCITY OF DIAMOND BAR
PROPOSAL FOR PROFESSIONAL
ON-CALL TRAFFIC AND
TRANSPORTATION
ENGINEERING SERVICES
LIN Consulting, Inc.
21660 Copley Drive, Suite 270
Diamond Bar, CA 91765
March 17, 2026
Table of Contents
Cover Letter ............................................................................................................................................. 0
Company Data ......................................................................................................................................... 1
Qualifications and Experience ............................................................................................................... 3
Appendix ................................................................................................................................................. 5
March 17, 2026
Cover Letter
Christian Malpica
Associate Engineer/Project Manager
City of Diamond Bar
Department of Public Works
21810 Copley Drive
Diamond Bar, California 91765
Subject: Request for Proposals (RFP) for On-Call Traffic and Transportation Engineering Services
Dear Mr. Malpica,
LIN Consulting, Inc., is pleased to submit this proposal as our formal response to the City of Diamond Bar’s request for
proposals for On-Call Traffic and Transportation Engineering Services. We trust that the enclosed proposal will provide
a clear illustration of our capabilities, resources, and experience in relation to providing services. Our team puts a
strong emphasis on developing a cost-effective approach to every project. We are particularly suited to the City's needs
for this RFP, specifically because:
✓ Familiarity with the City projects
LIN Consulting, Inc., consists of a team of highly skilled professionals adept at providing Traffic and Transportation
Engineering services. Our team has provided our services for multiple On-Call Task orders and projects throughout
Southern California.
✓ Tailored collaboration and flexibility
As a small engineering firm, our team is highly efficient in adapting swiftly to project changes and challenges to deliver
innovative, effective engineering solutions. We have done business by negotiating well-defined scopes of service,
keeping both schedule and cost on time and within budget for 29 years now. We are a team that you can count on
not only for the maximum value to dollar, but also for streamlined communication and project deliverables.
✓ Continuous commitment to Quality
Our team uses rigorous QA/QC procedures to prepare high quality products derived from our familiarity with
regulations that govern the implementation of our designs. Our engineers have vast breadth and depth of traffic
engineering knowledge rivaling large firms and we readily apply our experience to successfully deliver results.
Thank you for providing us with the opportunity to submit this proposal. We look forward to applying our Traffic and
Transportation knowledge for the City of Diamond Bar. LCI has read and acknowledges Addendum 1. This letter is
signed below by Sharon Lin, President of the firm.
Sincerely,
LIN Consulting, Inc.
Sharon Lin
President/Principal
With 23 years of Traffic and Transportation experience, our accomplished Traffic Manager, Ray
Kommidi, PE, TE has a comprehensive understanding of the City’s needs and will serve as the day-
to-day contact/Project Manager for the duration of the contract.
Mr. Kommidi is readily available through mail at 21660 Copley Drive, Suite 270, Diamond Bar, CA
91765, through phone at (714) 726-8960, and through e-mail at rkommidi@linconsulting.com.
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Company Data
Company Profile
LIN Consulting, Inc. (LCI), a California Corporation incorporated
in 1997, is a full-service professional engineering firm that
specializes in Traffic, Civil, and Electrical engineering. LCI is a
certified small business enterprise (SBE), women-owned
business enterprise (WBE), disadvantaged business enterprise
(DBE), minority business enterprise (MBE), community business
enterprise (CBE), and micro-business enterprise (SB-Micro), as
listed by the State of California and various other agencies in the
State. In total, the staff is comprised of 23 employees, 19 are
situated at the main corporate office in Diamond Bar and 4 at
our branch offices in Orange County and San Diego.
For 29 years, LCI has been well-regarded in the greater Southern
California region for our work on large-scale infrastructure
design/build projects, Capital Improvement projects, municipal
traffic engineering assignments, and private development
requests alike.
LIN Consulting, Inc. has over 20 years of experience in
completing On-call Task Orders and has been retained to
provide Traffic and Transportation Engineering services on an
on-call basis by a wide range of municipalities including the
multiple Cities, Counties, multiple districts of the California
Department of Transportation (Caltrans), and more.
LCI is well recognized for our high-quality work provided on
time and within budget.
For 29 years, LIN Consulting Inc. has successfully provided traffic
and transportation engineering services on over 950 projects. LCI is extensively familiar with On-Call Task Orders and
has provided work for numerous agencies in Southern California. Our engineers have vast breadth and depth of traffic
engineering knowledge rivaling large firms and we readily apply our experience to successfully deliver results:
LIN Consulting, Inc. has completed over 75 task orders for the:
•City of Commerce •City of San Juan Capistrano
•City of Corona •City of Ventura
•City of Downey •City of Yorba Linda
•City of Glendale •Los Angeles County
•City of Irvine •Port of Long Beach
•City of Lake Forest •Caltrans, District 6
•City of Lancaster •Caltrans, District 7
•City of La Mesa •Caltrans, District 8
•City of La Mirada •Riverside County Transportation Department
•City of Los Angeles •Ventura County Transportation Commission
•City of Mission Viejo •San Diego Association of Governments
•City of Pasadena •San Diego County Water Authority
•City of Pomona •Los Angeles County Metropolitan Transportation Authority
LIN Consulting, Inc.
Founded in 1997
Type of Business
California S-Corporation | DBE/MBE/SBE/WBE
Office Locations:
➢ Diamond Bar (Headquarters/Office of Service)
21660 Copley Drive, Suite 270
Diamond Bar, CA 91765
➢ Tustin
1432 Edinger Avenue, Suite 230
Tustin, CA 92780
➢ San Diego
4858 Mercury Street, Suite 207
San Diego, CA 92111
President/Principal
Sharon Lin
(909) 396-6850 ext. 115
slin@linconsulting.com
Project Manager (Contact Person)
Ray Kommidi, PE, TE
(714) 726-8960
rkommidi@linconsulting.com
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
LCI’s Area of Expertise
1. Traffic Engineering Design Services
Signing and Striping Design Intelligent Transportation Systems
Worksite Traffic Control Design Transportation Management Plan
Traffic Signal Design/Modifications Interconnect Plans
Traffic Calming Design Preliminary Engineering Design
Street Improvements Project Technical Specifications
Street Lighting Analysis and Design Title Sheet
Fiber Optic Plans Roadway and Intersection Design
2. Transportation Studies
Accident Analysis Report Signal Operation and Coordination
Traffic Impact Studies Traffic Operations and Simulation
Traffic Analysis School Related Circulation
Parking Studies Traffic Control Device Studies
Preliminary Design Reports Traffic Flow and Queuing
Public Transit Feasibility Studies Drainage Analysis
Warrant Investigations for Signals and Turn
Lanes
Signal Warrant/ Intersection Control
Evaluation
Sign and Pavement Marking Retro-Reflectivity
Assessment
Parking Supply, Utilization, and Demand
Studies and Analysis
ADA Standard Improvements/Evaluations
3. Transportation Planning Services
Engineering & Traffic Surveys Verifications and Data Review
Complete Streets Planning Review of Record Data
Field Inventory/Site Visits Conceptual Engineering
Data Collection Utility Coordination
Safety Studies Grant Writing Assistance
Transportation Corridor and Area-Wide
Planning
Intersection Control Studies
From plan reviews to traffic safety to transportation analysis, our planners and engineers strive to enhance circulation,
increase safety, and provide better transportation solutions for our clients. We are passionate about transportation
because we know innovative transportation engineering can benefit the people where we live and work.
29 years of dedicated business providing Traffic, Civil, and Electrical Engineering Services
Our Consistent Commitment to Our Clients
✓ Proven track record: Extensive professional experience with similar Traffic, Civil, and Electrical
engineering projects delivered on time and within budget
✓ Principal involvement: Time-tested managerial staff and rigorous oversight process ensure quality
results and full responsiveness to client needs
✓ Best value services: Cost-effective processes and procedures streamline the design process,
minimizing excessive costs and schedule delays
✓ Familiarity with the City guidelines and 29 years of experience working for State, City, and County
agencies
✓ Quality designs produced according to stringent requirements and tight time constraints
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Qualifications and Experience
EDUCATION
BS, Civil Engineering, University of
California, Berkeley
LICENSES
Professional Civil Engineer, CA
57664
Professional Traffic Engineer, CA
2197
PROFESSIONAL MEMBERSHIP
Institute of Transportation
Engineers, Member
American Society of Civil Engineers,
Member
YEARS OF EXPERIENCE: 33 years
Mr. Sun has over 30 years of traffic engineering and transportation design and
planning experience working as a consultant with various agencies throughout
California. His extensive experience includes the design of traffic signal
systems, signal interconnect systems, signing and striping, worksite traffic
control plans (WTCP), detour plans, street lighting, Intelligent Transportation
Systems (ITS), traffic operation and analysis, and Transportation Management
Plans (TMP).
City of Industry, SR-57/SR-60 Confluence Project (Industry, CA) Principal-in-
Charge and Project Manager. Mr. Sun is overseeing the preparation of PS&E
for both temporary and final Traffic Signals, Ramp Metering Systems, Traffic
Monitoring Station, Lighting and Sign Illumination, Communication System,
and electrical service for Irrigation. He also guided the preparation of the
Transportation Management Plan (TMP) and TMP Data Sheet. Project duration
was from 04/2014 – On-going.
City of Santa Clarita, Magic Mountain Parkway Beautification (Santa Clarita,
CA) Principal-in-Charge. Mr. Sun is overseeing the project management and
coordination, research and data gathering, concept plans, design alternates,
traffic signal modifications, street improvement design, street lighting design,
fiber optic design, signing and striping design, traffic control, plans
specifications & estimates (PS&E), and right-of-way activities. This project will
improve the final 2,500 LF of Magic Mountain Parkway from Avignon to
Interstate 5 with medians, curb, gutter, sidewalks, lodge pole fencing, traffic
signal modifications, restriping, fiber optic communications, lighting and bike
trail connections. Project duration was from 05/2024- 10/2025.
City of Yorba Linda, La Palma Avenue Improvement Feasibility Study (Yorba
Linda, CA) Principal-in-Charge. Mr. Sun oversaw data collection, field review,
Synchro model development, analysis, conceptual engineering, project report,
and presentation to Traffic Commission. The Synchro models provided a series
of feasible alternatives for the La Palma Avenue Congestion Improvement
Study Technical memo. Project duration was from 01/2020- 09/2021.
San Gabriel Valley Council of Governments (SGVCOG), Montebello Avenue
Grade Separation Traffic Study (Montebello, CA) Principal-in-Charge. Mr. Sun
is overseeing the preparation of the traffic study report in Phase I of the
project. The traffic study will review the proposed Montebello Grade
Separation Project and analyze the impacts of the proposed project on the
study area (47 study area intersections and 16 roadway segments) and
recommend mitigation measures. The TMP is to evaluate various strategies to
provide congestion relief during the construction of the project by managing
traffic flow and balancing traffic demand through the project area. Mr. Sun
also handled the PS&E preparation for signing and striping, traffic signal
design, traffic handling and detour and street lighting design. As part of the at-
grade improvements, traffic signal preemption calculations for the
intersections of Mines Ave/Vail Ave and Greenwood Ave/Truck Wy are also to
be developed. Project duration was from 05/2015- Ongoing.
William Sun, PE, TE
Principal-in-Charge
Resumes
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
EDUCATION
MS, Civil Engineering
Clemson University
BS, Civil Engineering
Osmania University, India
LICENSES
Professional Civil Engineer, CA,
76481
Professional Traffic Engineer, CA,
2591
YEARS OF EXPERIENCE: 23 years
Mr. Kommidi has over 20 years of work experience in design and management
of projects involving traffic signal design, traffic operations, traffic engineering
studies, signing and striping, work zone traffic control, street and pedestrian
lighting design, and more. He also has extensive experience performing traffic
signal preemption analysis and conducting operational evaluations using tools
such as SYNCHRO, HCS, and TRAFFIX. Ray has served as the Traffic Signal Design
Lead and Engineer of Record on numerous complex and municipal
transportation and transit infrastructure projects
City of Yorba Linda, Valley View Safety (Yorba Linda, CA) Project Manager. Mr.
Kommidi serves as the Traffic Signal Design Lead and Engineer of Record (EOR)
for the traffic signal design plans. He is responsible for developing the traffic
signal plans, coordinating with PSOMAS and the City of Yorba Linda, preparing
supporting calculations, and ensuring all signal design elements comply with
City standard plans and specifications, Caltrans Standard Plans and
Specifications, and the California MUTCD (CA MUTCD). Project duration is from
12/2025 – Ongoing.
City of La Mirada, Santa Gertrudes Avenue Corridor Traffic Signal Upgrade
Project (La Mirada, CA) Project Manager and Engineer of Record. Mr. Kommidi
oversees the preparation of traffic signal PS&E for four intersections and the
Traffic analysis memorandum. The project is currently under construction and
City of La Mirada retained LCI to provide Design Services during Construction.
Project duration is from 01/2019 – Ongoing.
Long Beach Utilities Department, Large Valve Traffic Control Plans (Long
Beach, CA) Project Manager. Mr. Kommidi was responsible for the the
preparation of worksite traffic control plans (WTCP) for the Willow Street
Project that involved replacement of potable water valves. He worked with
Long Beach Utilities and the contractor to come up with construction staging
and detailed WTCP for installation of line stop and gate valves. Project duration
is from 09/2023- 10/2023.
City of Glendale/Los Angeles County Metropolitan Transportation Authority
(LACMTA), Doran Street Crossing Grade Separation (Glendale, CA) Task Lead.
Mr. Kommidi is currently tasked with the preparation of traffic signal
modification plan and pre-emption calculations for the intersection of Doran
Street and San Fernando Road. Mr. Kommidi also participated in coordination
meetings with CPUC staff and coordinated with City of Glendale and LADOT
staff. The purpose of the Doran Street and Broadway/Brazil Safety and Access
Project is to improve safety and mobility while maintaining suitable access to
existing businesses and surrounding residential areas. The Doran Street
crossing will be retrofitted in the short-term to improve safety, including signal
modifications, a new pedestrian crossing, and a modified roadway for one-way
(westbound) use only. Project duration is from 10/2014 – On-going.
Riverside County Transportation Commission (RCTC), Jurupa Valley Grade
Separation Project (Jurupa Valley, CA) Task Manager. Mr. Kommidi was
responsible for the preparation of Transportation Management Plan Report,
Traffic Signal Design PS&E that included temporary traffic signals and street
lighting. Project duration was from 03/2018 – 07/2023.
Ray Kommidi, PE, TE
Project Manager
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Appendix
EDUCATION
M.S., 1996, Civil Engineering
University of California, Berkeley
B.S., 1995, Civil Engineering
Pennsylvania State University
LICENSES
Professional Civil Engineer, CA,
61311
Professional Civil Engineer, AZ,
45780
Professional Traffic Engineer, CA,
2226
Professional Traffic Operations
Engineer, 1659
PROFESSIONAL MEMBERSHIP
Institute of Transportation
Engineers, Member
American Public Works Association,
Member
YEARS OF EXPERIENCE: 30 years
Mr. Kane has 30 years of traffic engineering experience including
transportation and traffic engineering design, parking surveys and design,
traffic control plans, lighting analysis and design and roundabout design. He
has served as a Project Manager and Design Engineer for the preparation of
thousands of plans, specifications and estimates (PS&E) for traffic engineering
design projects in Southern California. These projects involved traffic signals,
signing/striping, traffic control plans, roadway/trail lighting, and traffic signal
interconnect. Mr. Kane’s work is always prepared for the requirements and
needs of his clients. His skill set also includes business development, curriculum
design, marketing, regional practice leadership, staff supervision and staff
training.
City of Escondido, Bear Valley Parkway (Escondido, CA) Project Manager. Mr.
Kane oversaw the preparation of the Traffic Signing and Striping Plans, Traffic
Installation Plans, and 5 stages of Traffic Control plans. Specific tasks included
reviewing existing and proposed improvement plans for the project roadway
segments and intersections, close coordination with the City to ensure City
standards were met and deliverables were on time and within budget, traffic
signal timing plans, project special provisions and construction cost estimates,
and plan processing. Project duration was from 03/2022- Ongoing.
City of San Diego, Baker Elementary TCP (San Diego, CA) Project Manager.
Mr. Kane reviewed the existing and proposed improvement plans for the
project roadway segments/intersections, coordinated with the City of San
Diego for pertinent design standards, oversaw the preparation of the final
signing and striping plans and the workzone traffic control plans, and provided
any additional support for project special provisions, construction cost
estimates, plan processing, and meetings. Project duration was from 06/2022-
12/2023.
City of Chula Vista, Traffic Signal Retiming of 99 Locations (Chula Vista, CA)
Project Manager. The project is in eastern part of Chula Vista and consists of
99 signalized intersections. The project aimed to optimize coordination
between signals, update pedestrian red and yellow clearance times, and
survey locations for bicycle timing. Mr. Kane conducted signal inventories,
pedestrian and bicycle crossing measurements in accordance with CA MUTCD
and industry practice. Project duration was from 06/2022- 12/2023.
City of Oceanside, Design for Rancho Del Oro Drive-San Ramon Drive Traffic
Signal, Oceanside, CA Project Manager. LCI was asked to prepare a traffic
signal installation design plan at the intersection of Rancho Del Oro and San
Ramon Avenue in the City of Oceanside. The traffic signal design also included
coordination with the local utility company and construction phase services
with the signal installation contractor. Mr. Kane was instrumental in acquiring
plan set approval with the City, acting as lead engineer on the project and
conducting many meetings with City of Oceanside staff. Project duration was
from 02/2019 – 10/2020.
Saul Kane, PE, TE, PTOE
QA/QC
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
EDUCATION
BS, Civil Engineering
Drexel University
YEARS OF EXPERIENCE: 19 years
Mr. Walbert has 19 years of professional experience in traffic and civil
engineering utilizing CADD in MicroStation and AutoCAD. His design
experience includes traffic signal design, traffic signal interconnect design,
street lighting design, signing/striping, and traffic handling/detour design
plans.
City of Irvine, Jeffrey/I-5 Bicycle & Pedestrian bridge and Jeffrey Open Space
Trail (JOST) Project (Irvine, CA) Project Engineer. Mr. Walbert is aiding in the
preparation of the Traffic Management Plan. The Traffic Management Plan was
prepared to reduce potential construction-related traffic conflicts, detours and
delays and ensure the design provides safe and efficient vehicular, pedestrian
and bicycle traffic flow throughout the project area during all phases of
construction. Project duration is from 06/2019 – Ongoing.
City of Moreno Valley, Juan Bautista De Anza Historic Corridor, Segment of
Multi-Use Trail from El Portrero Park to Iris Avenue (Moreno Valley, CA)
Project Engineer. Mr. Walbert aided in the preparation of the traffic signal
modification and signing/striping PS&E for the improvements to the Krameria
Avenue and Kitching Street intersection. The improvements to the intersection
were required due to the multi-use trail project requirements and included the
installation of a pedestrian scramble phase. Project duration was from 2/2018
– 3/2021.
City of Rancho Santa Margarita, Santa Margarita Parkway Bridge Hinge
Repair (Rancho Santa Margarita, CA) Project Engineer. Mr. Walbert’s tasks
included preparation of traffic control plans for the repair of a bridge hinge on
Santa Margarita Parkway (SMP) in the City of Rancho Santa Margarita. Plans
for each of two stages had to be developed. The detour for westbound traffic
on SMP turning left at Alicia Parkway had to be detoured onto the bridge for
eastbound traffic. Plans for the restoration of the existing signing and striping
on SMP after the completion of construction were also prepared. Project
duration was from 10/2015 – 02/2021.
City of Culver City, Bus Signal Priority System Project (Culver City, CA) Project
Engineer/Drafting. Mr. Walbert tasks included field visits to determine existing
conduit fill percentages and preparation of bus signal priority traffic signal
plans for the City of Culver City. He also aided in the preparation of Final and
“as-built” design plans showing WLAN communication equipment installation
for up to 47 intersections along 7-Bus lines. The BSP system will make use of
existing on-bus systems that incorporate GPS-based automatic vehicle
location equipment, wireless communications, and advanced intersection
traffic controller technologies. Project duration was from 08/2018 – 08/2020.
City of Fillmore, State Route 126 and Mountain View Street Intersection
Improvements (Fillmore CA) Project Engineer. Mr. Walbert tasks included
preparation of traffic signal plan, signing and striping plan, and traffic handling
plan. The scope of work included the design of a new traffic signal,
interconnect to the existing signal on State Route 126 at Central Avenue,
signing and striping modifications and civil improvements to the northwest,
southwest and southeast corners. Project duration was from 09/2015 –
01/2017.
Ryan Walbert
Assistant Project Manager
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
EDUCATION
MS, 2017, Civil Engineering
Northeastern University Boston, MA
BS, 2015, Transportation
Management Dalian Maritime
University, Dalian, China
YEARS OF EXPERIENCE: 8 years
Ms. Song has 8 years of traffic engineering experience specializing in traffic
planning, traffic studies, and traffic signal operation and coordination. Her
engineering experience also includes traffic analysis by performing Synchro
Models to simulate the existing condition and a series of feasible alternatives,
developing signal timing reports for intersections in a coordinated segment by
Synchro.
City of Industry, SR-57/SR-60 Confluence (City of Industry, CA) Project
Engineer. Ms. Song assisted in the preparation of the TMP for all three phases
of the project and analyzied traffic conditions of the project and presented
traffic evaluation due to the construction. The approval of the TMP required
coordination with Caltrans and local agencies. Project duration was from
04/2014 – On-going.
City of Placentia, Engineering and Traffic Surveys (Placentia, CA) Project
Engineer. Ms. Song was responsible for providing the recommended speed
limits based on the 85th percentile speed by utilizing information derived from
the speed survey and crash data. She also identified potential safety concerns
from the data. Furthermore, Ms. Song prepared the E&TS (Engineering and
Traffic Survey) sheets for each speed zone and compiled the findings and
recommendations into a comprehensive report. Project duration was from
9/2023 – 3/2024.
City of Yorba Linda, Traffic Signal Priority Study (Yorba Linda, CA) Project
Engineer. Ms. Song helped prepare the Traffic Analysis memorandum which
documented the results of the warrant analysis, Traffic Signal priority ranking
methodology and calculations, and the results of the priority ranking with the
proposed implementation schedule and plan. The memorandum took into
consideration the ADT and peak hour traffic volumes, proximity of school
and/or other pedestrian generators, signal coordination, speed and speed
variances, community impacts, and other potential factors such as sight
distance issues. Project duration was from 08/2018 – 03/2019.
City of Glendale, San Fernando Road Beautification (Glendale, CA) Project
Engineer. Ms. Song helped prepare the Traffic Corridor Study for phase 1 and
phase 2 of the project. Ms. Song was responsible for the study of the exiting
conditions of roadway segments, lane configurations, pedestrian and bikeway
facilities, and feasibility studies by utilizing Synchro. Project duration was from
02/2023 – 07/2023.
City of Ventura, Montalvo Safe Routes to School Cypress Point Gap Closure
and Complete Streets (Ventura, CA) Project Engineer. Ms. Song helped
prepare conceptual designs for a Complete Streets corridor and Class I Path gap
closure through Montalvo community, one of the City of Ventura's most
disadvantaged neighborhoods. She used recent orthorectified aerial
photography and County Assessor Parcel GIS data to produce 15% concept-
level designs which included state-of-the-art bike signal boxes, bike queue
boxes, buffered bicycle lanes, sidewalk gap closures, and a DIB 89 compliant
Class IV Cycle Track. Project duration was from 09/2018 – 08/2023.
Sihua Song
Assistant Project Manager
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
EDUCATION
B.S., 2018, Civil Engineering
University of California, Irvine
LICENSES
Civil Engineer-in-Training #175542
YEARS OF EXPERIENCE: 8 years
Mr. Tan has 8 years of professional experience in traffic and civil engineering.
Mr. Tan is familiar with AutoCAD, Synchro, Microsoft Office, and has taken
courses such as Transportation Analysis and Design, Traffic
Operations/Control, and Transportation Planning and Forecasting. His
professional experience includes design of transportation systems, traffic
signals, intelligent transportation systems (ITS), guardrail design, CCTV video
communication design, roadway and highway lighting, traffic signal system
design, signing and striping, stage construction/handling, and traffic control.
He has worked on several transportation related projects that include
autonomous connected vehicle technologies, traffic signal design, analysis,
synchronization, and roadway design.
City of Carpinteria, Traffic Signal at Carpinteria Avenue and Palm Avenue
(Carpinteria, CA) Project Engineer. Mr. Tan is involved in the design of
improvement plans, specifications and cost estimates, project reports and
engineering support during construction. Specific tasks Mr. Tan is involved in
include design for the installation of a traffic signal and project improvements
including traffic signing/striping with high visibility crosswalks. Project duration
is from 03/2021- Ongoing.
City of Culver City, Signal Upgrade and Left Turn Phasing Project, PL-007
(Culver City, CA) Project Engineer. Mr. Tan assisted with design of 2 signal
modification at 2 locations in Culver City. The City was seeking a consultant to
provide field review and survey, utility research, ADA curb ramp design,
preparation of construction drawings for traffic signal modification design, for
the installation of left-turn phasing at twelve signalized intersections. The
approaches and types of left-turn phasing installed are Sawtelle
Boulevard/Washington Boulevard (EB/WB: protected/permissive) and
Sawtelle Boulevard/Washington Place (EB/WB: protected/permissive). Project
duration was from 02/2019-11/2021.
Riverside County Transportation Commission (RCTC), I-15 at Railroad Canyon
Interchange (Lake Elsinore, CA) Project Engineer. Mr. Tan designed/drafted
the ramp metering system, assisted in designing the traffic signal system,
conducted field work, and worked on the comments received from previous
submittals. The improvements included the reconstruction of the northbound
ramps to a hook configuration to Grape Street and to maintain the existing SB
diamond ramps, widen the southbound on ramp to three lanes, widen Railroad
Canyon Road to 8 lanes, install ramp metering on the on-ramps, construct a
northbound deceleration lane, and acceleration lane at the on-ramps. Project
duration was from 09/2017 – 1/2024.
City of Chula Vista, Traffic Signal Retiming of 113 Locations (Chula Vista, CA)
Project Engineer. Mr. Tan helped prepare fieldwork notes for 113 locations to
include lane configuration, cross walk distance measurements, types of
detection, speed limits, grade per approach, signal phasing, bus stop locations,
parking availability, photos of existing conditions, and traffic signal cabinet
inventory. The project objective under the Federal Highway Safety
Improvement Program (HSIP) is to enhance safety at signalized intersections
by improving signal timing operations. Project duration was from 03/2020-
6/2020.
Jerry Tan, EIT
Project Engineer
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Approach
LIN Consulting, Inc. understands the scope of services includes a full range of traffic engineering, planning, and
operational support. LCI is extremely familiar with the requested services and can successfully complete anticipated
task orders from the City of Diamond Bar.
The LCI engineers can analyze the traffic impacts of proposed developments including office, residential, commercial,
educational, medical, retail, and other land uses, as well as mixed-use development. Our engineers research existing
conditions, conduct field investigations, and apply the latest analytical tools, techniques and software to develop
reliable assessments of traffic impacts. LCI has prepared hundreds of traffic impact analysis studies for numerous
agencies and private developers throughout Southern California. Our staff utilizes tools such as Synchro software,
which report results in both ICU and HCM methodologies. Our staff has experience preparing studies with as many as
350 study intersections.
LCI prioritizes the optimization of traffic flow taking care to integrate multi-modal transportation options, such as public
transit, cycling, and walking, to create a balanced and efficient transportation network. We are able to assess the
feasibility and benefits of these various modes and develop traffic solutions that improve accessibility and reduce
congestion. Our approach includes implementing strategies such as synchronized signal timing, dedicated lanes, and
traffic calming measures to enhance the movement of all road users. With extensive experience in Engineering and
Traffic Surveys (E&TS) across multiple cities, LCI leverages this expertise to inform and enhance traffic calming
initiatives.
LCI can conduct assessments of existing infrastructure, identify gaps or barriers, and recommend improvements to
support active transportation modes. LCI can also develop strategies to improve route visibility, accessibility, and
safety, such as the installation of bike lanes, crosswalks, and pedestrian signals. LCI has been involved in several school
related circulation projects in Southern California. Typical types of projects include traffic impact studies, traffic
circulation assessments, warrant studies and traffic calming studies. These projects have been focused primarily on
Safe Routes to School and pedestrian circulation assessments.
Design work for traffic signal improvements is a critical aspect of modern traffic management, involving the upgrading
of signal systems to enhance traffic flow, reduce congestion, and improve safety. This process includes the integration
of advanced technologies such as adaptive signal control, pedestrian and bicycle detection systems, and energy-
efficient LED lighting. LCI is particularly well-suited to undertake this work, given its extensive expertise in traffic
engineering and a proven history of successful signal improvement projects. LCI’s comprehensive approach not only
improves the efficiency of traffic movement but also enhances safety for all road users, making LCI a trusted partner
for municipalities looking to upgrade their traffic signal infrastructure. LCI’s standard of practice is to prepare traffic
signal installation/modification plans at a scale of 1"=20'. The traffic signal modification/ installation plans provide
details necessary for the construction of a traffic signal modification/installation. At minimum, the plans can include,
but are not limited to, replacement and/or installation of traffic signal poles, conduits, wires, cables, interconnect, fiber
optic cable, loops, pull boxes, service equipment, controller equipment, battery back-up system, enclosures, electrical
feed, luminaires, mast arm signs, and as well as the necessary construction notes, schedules, phasing diagram, and
details.
LCI standard Traffic Control and Stage Construction plans are prepared at a scale of 1"=40'. At minimum, traffic control
and stage construction plans will depict, the existing and proposed temporary k-rail, striping, signing, pavement
markings, pavement markers, pavement text, delineators, and as well as other pertinent construction notes, and
details drafted per City Standard Plans and meet the latest California Manual of Uniform Traffic Control Devices.
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
LCI Scope of Work Checklist
A. Traffic Engineering / Studies
Review traffic impact studies and traffic sections of
environmental documents
X
Speed surveys and speed limit determinations X
School safety evaluations and citizen complaint
investigations
X
Intersection level of service analysis and traffic control
device evaluations
X
Vehicle Miles Traveled (VMT) analysis, including project
screening, technical review, mitigation evaluation, and
support for CEQA compliance consistent with
State and regional guidelines
B. Design / PS&E / Plan Checking
Geometric design and traffic signal design, including
preparation of plans, specifications and estimates
(PS&E)
X
Signing and striping plans X
Plan checking and/or document review for proposed
development projects and traffic control plans related
to encroachment permits
X
Plan check turnaround target is ten (10) working days
for complete submittals unless otherwise directed by
the city.
X
C. Construction Support
Construction administration/inspection support as
requested
X
D. Transportation Planning / Coordination
Preparation of traffic data for compliance with the
Congestion Management Program
X
Support for City’s Transportation System Planning (SR-
57/60, grade separation projects, transit studies, etc.).
Coordination with City staff and consultants for traffic
requirements for Capital Improvement Projects.
X
E. Traffic Management Systems / Signal Operations
Operational support for the City’s Traffic Management
System (TransSuite) and Adaptive Traffic Control System
(SCOOT), as deemed necessary
Field technical support for traffic network
communication troubleshooting, equipment set up and
configuration
Support for ongoing traffic signal operations, including
implementation of signal timing and coordination
programs as deemed necessary
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
F. Meetings / Other Services
Attendance at City Council, Traffic and Transportation
Commission, and other meetings as necessary
X
Other related services as requested/directed by the City Dependent on services requested
Project Controls
Mr. Ray Kommidi, PE, TE will serve as the primary point-of-contact and Project Manager. Our experienced Project
Manager will delegate responsibilities to the staff for each individual task order. LCI encourages frequent meetings,
confirmation of goals and expectations, documentation and maintenance of records, preparation of clearly defined
task descriptions, and clear assignment of overall project team roles and responsibilities as a means of delivering quality
project deliverables, on time, and within budget.
After receiving a Notice to Proceed, LCI’s Project Manager will utilize our established procedures for control, cost, and
schedule reporting. We will provide monthly written invoices on staffing, cost, and schedule status of each task, as well
as the progress made on the task. The monthly invoices will also make note of anticipated problems and potential
solutions, should problems arise. Additionally, these monthly invoices serve to closely and effectively communicate
with the City staff and officials, other jurisdictional stakeholders, and the public to facilitate successful delivery of all
assigned tasks.
The contract staffing levels, budget, and schedule shall be regarded as the baseline against which status and progress
are measured and reported. Should schedule challenges arise, we will perform a “cost to complete” budget analysis
and work directly with the City of Diamond Bar to adjust schedule and staffing accordingly to bring the project to a
satisfactory conclusion within the established scope of work and deliverables.
LCI’s three offices are integrated into one common server which allows staff in all the offices to work on projects
concurrently and effectively. Communication between our offices is conducted via telephone, e-mail, and face-to-face
meetings. Our managers also meet weekly to discuss and review overall company workload, schedules, and balance
staff resources. We employ internal project schedule tracking procedures using Microsoft Excel spreadsheets to
facilitate communication between staff engineers and the project manager.
The following table shows a typical work plan process followed by LIN Consulting, Inc. staff members:
No. General Work Plan
1. Receipt of a Project Task Order.
2. Provide Scope of Work and Fee Estimate to City of Diamond Bar Project Manager.
3. Commence work upon receiving the Notice to Proceed (NTP).
4. Develop a Work Plan including project tasks, schedule, and deliverables.
5. Kick-off meeting to confirm the requirements and obtain pertinent as-built documents.
6. Execute Work Plan.
7. Prepare project deliverables, including all necessary coordination with City staff and stakeholders.
8. Provide deliverables to the City staff and project stakeholders (if required) for review.
9. Incorporate comments from the City staff and/or other project stakeholders.
10. Provide City with final deliverables.
To consistently guarantee high-quality products for projects on time and within budget, LIN Consulting, Inc. has
developed a thoroughly tailored project management plan and quality control system. Our project team routinely uses
detailed project scheduling procedures, project work orders, project team meetings, project cost reviews and
projections, reviews of technical/administrative status, and progress reports for project management control
purposes. Depending on the size of each On-call Task Order, the following controls are applied:
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Project Scheduling Procedures –The Project Manager will prepare an internal detailed project schedule based
upon contract requirements. This schedule will delineate the major tasks, personnel assignments, and the time
schedule used to gauge their performance. The schedule will outline work tasks, assignments, and milestones, as
well as the communication, coordination, and review process that will be followed throughout the project. The
Project Manager will update the project schedule every month for internal planning purposes. The updated
schedule will show any revisions necessitated by the actual occurrence of events.
Project Cost Control – A software application program is utilized to process hours worked and expenses charged
to the project on a weekly basis. A sub-project number is assigned to every task in an effort to better categorize
and track all time and expense spent on an individual task.
Project Progress Reports - A progress report will be submitted to the City every month. The items covered in the
report will include activities completed, scheduled activities for the next period, meetings attended, problems and
suggested mitigation steps, and budget status.
Project meetings with City staff will be held as often as desired by the City to exchange information, review progress,
identify problems, and determine any necessary adjustments to the work plan. The LCI team recognizes meetings are
an integral part of the work required to accomplish project tasks and meet pre-scheduled milestones. Types of
meetings include, but are not limited to, the following:
Task Kick-off Meeting - During this meeting, LIN Consulting will request any information or data needed by its
engineers from the City’s Project Manager. This information may include items such as as-built plans, traffic counts,
and preliminary improvement identifications performed by the City. We would also discuss the general scope and
schedule of the project, redefining them as needed.
Task Review Meetings - During these meetings, we will discuss and request clarifications on any City comments or
questions prior to implementing the revisions. Meeting minutes will be prepared by LIN Consulting’s team and
submitted to the City within one week after the meeting.
In addition to meeting with the City, LIN Consulting’s Project Manager will hold routine internal project meetings to
ensure all team members are working towards the project goals in the most efficient and expeditious manner possible.
The protocols outlined above serve to streamline the Task order completion process and to allocate work as efficiently
as possible for the City of Diamond Bar.
Statements
LIN Consulting, Inc. has reviewed the consulting services agreement and agrees all terms and conditions outlined in
the provided consulting services agreement are acceptable.
LIN Consulting, Inc. ensures all proposed staff are readily available to provide the required services. Staff shall not be
changed without the City of Diamond Bar’s written approval.
Cost Proposal
Cost proposal is submitted as a separate PDF file on PlanetBids as requested by the City of Diamond Bar.
Experience
LCI has provided three (3) comparable projects of similar scope and service completed within the past three (3) years
below. We encourage the City of Diamond Bar to contact the references provided to inquire about our performance,
technical expertise, and ability to meet deadlines, budgets, and quality.
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar
Project Name
Yorba Linda TO11 Misc. Traffic Analysis
Location
Yorba Linda, CA
Client
City of Yorba Linda
4845 Casa Lima Avenue
Yorba Linda, CA 92885
Reference
Tony Wang, PE, TE, PTOE
Traffic Engineering Manager
(714) 961-7070
twang@yorba-linda.org
Services Provided
LCI provided one analysis for each of up to twenty (20) intersections or roadway segments, or tasks as
designated by City of Yorba Linda. Such analyses included intersection level of service, ICU, and HCM analysis,
Traffic signal or all-way stop warrant analysis, Engineering and Traffic Survey, SCAG Highway Performance
Monitoring System (HPMS) data reporting , traffic calming studies, and other specific minor analysis tasks as
requested by the City. Some analysis functions required a field review by LCI staff. LCI also provided, at the
request of the City, support for these analyses including letter summary, assistance with Staff Report review
and attendance at public meetings. LCI also provided, at the request of the City, technical memoranda
summarizing the results of analyses and stating conclusions and/or recommendations.
Contract Duration 07/2021 – 06/2023
Project Name
TO4 E&TS for up to 20 Locations
Location
Yorba Linda, CA
Client
City of Ventura
501 Poli Street
Ventura, CA 93001
Reference
Derek Towers
Active Transportation Specialist
(805) 654-7849
dtowers@cityofventura.ca.gov
Services Provided
LIN Consulting Inc. provided the City of Ventura with an Engineering and Traffic Survey (E&TS) for up to 20
roadway segments within the City limits. The E&TS had to conform to State of California Vehicle Code (CVC)
and California MUTCD. Speed survey data and daily traffic counts were collected to determine speed limit
changes including which were to remain as is and which to adjust, and prepare E&TS data sheets for the City’s
adoption.
Contract Duration 3/2024 – 9/2024
Project Name
Menifee HSIP Cycle 11
Location
Menifee, CA
Client
City of Menifee
29844 Haun Road
Menifee, CA 92586
Reference
Diego Guillen, PE, QSD/QSP
Senior Engineer, Capital Improvement Program
(951) 723-3755
dguillen@cityofmenifee.us
Services Provided
LCI is responsible for the preparation of up to 28 traffic signal intersections designs to upgrade: signal controller,
battery backup system, Accessible Pedestrian Signal (APS), signal vehicle head and yellow reflectorize border
backplate replacements (RRFB). This project is part of City of Menifee’s Circulation Improvement Program and
aimed to enhance the safety of both pedestrians and drivers at intersections.
Contract Duration 05/2024- 10/2025
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Proposal for On-Call Traffic and Transportation Engineering Services | City of Diamond Bar