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HomeMy WebLinkAboutT&T Commission Agenda Packet 5-8-25 TRAFFIC & TRANSPORTATION COMMISSION AGENDA May 08, 2025 6:30 PM Diamond Bar City Hall Windmill Community Room Diamond Bar, CA 91765 Telephonically: +1 (914) 614-3221 – Access Code: 795-075-499 https://attendee.gotowebinar.com/register4358717427208280928 Chairperson Patrick Mercado Vice Chairperson Romulo Morales Commissioner Gary Busteed Commissioner Amy Mao Commissioner Raphael Plunkett Written materials distributed to the Traffic and Transportation Commission within 72 hours of the Traffic and Transportation Commission meeting are available for public inspection immediately upon distribution in the City Clerk's office at 21810 Copley Drive, Diamond Bar, California, during normal business hours. Copies of staff reports or other written documentation relating to agenda items are on file in the Public Works Department, located at 21810 Copley Drive, and are available for public inspection. If you have questions regarding an agenda item, please call 909.839.7040 during regular business hours. In an effort to comply with the requirements of Title II of the Americans with Disabilities Act of 1990, the City of Diamond Bar requires that any person in need of any type of special equipment, assistance or accommodation(s) in order to communicate at a City public meeting must inform the Public Works Department at 909.839.7040 a minimum of 72 hours prior to the scheduled meeting. Please refrain from smoking, eating or drinking in the Windmill Community Room The City of Diamond Bar uses recycled paper and encourages you to do the same TRAFFIC AND TRANSPORTATION COMMISSION MEETING RULES Welcome to the meeting of the Traffic and Transportation Commission. Meetings are open to the public. You are invited to attend and participate. PUBLIC INPUT Members of the public may address the Commission on any item of business on the agenda during the time the item is taken up by the Commission. In addition, members of the public may, during the Public Comment period, address the Commission on any item or any matter not on the agenda and within the Commission’s subject matter jurisdiction. Persons wishing to speak should submit a speaker slip to the meeting clerk. Any material to be submitted to the Traffic and Transportation Commission at the meeting should be submitted through the meeting clerk. Speakers are limited to five minutes per agenda item, unless determined otherwise. The Commissioners may adjust this time limit depending on the number of people wishing to speak, the complexity of the matter, the length of the agenda, the hour and any other relevant consideration. Speakers may address the Commission only once on an agenda item, except during public hearings, when the applicant/appellant may be afforded a rebuttal. Public comments must be directed to the Commission. Behavior that disrupts the orderly conduct of the meeting may result in the speaker being removed from the Commission meeting room. INFORMATION RELATING TO AGENDAS AND ACTIONS OF THE COMMISSION Agendas for regular Traffic and Transportation Commission meetings are available 72 hours prior to the meeting and are posted in the City’s regular posting locations, and on the City’s website at www.diamondbarca.gov. A full agenda packet is available for review during the meeting, at the back of the meeting room. The Traffic and Transportation Commission may take action on any item listed on the agenda. ACCOMMODATIONS FOR THE DISABLED A cordless microphone is available for those persons with mobility impairments who cannot access the podium in order to make a public comment. Sign language interpretation is available by providing the City Clerk three business days’ notice in advance of a meeting. Please telephone (909) 839-7010 between 7:30 a.m. and 5:30 p.m. Monday through Thursday and 7:30 a.m. to 4:30 p.m. on Fridays. HELPFUL PHONE NUMBERS Computer access to agendas: www.diamondbarca.gov General information: (909) 839-7040 Written materials distributed to the Traffic & Transportation Commission within 72 hours of the Traffic & Transportation Commission meeting are available for public inspection immediately upon distribution in the City Clerk’s Office at 21810 Copley Dr., Diamond Bar, California, during normal business hours. CITY OF DIAMOND BAR TRAFFIC AND TRANSPORTATION COMMISSION AGENDA Thursday, May 08, 2025 WINDMILL COMMUNITY ROOM Diamond Bar City Hall 21810 Copley Drive, Diamond Bar CALL TO ORDER: 6:30 P.M. PLEDGE OF ALLEGIANCE: Commissioner Busteed ROLL CALL: Commissioners Busteed, Mao, Plunkett, Vice- Chair Morales, Chair Mercado I. APPROVAL OF MINUTES: A. T&T Commission Meeting Minutes of March 13, 2025 Recommended Action: Receive and File II. PUBLIC COMMENTS: This is the time and place for the general public to address the Commission. Items to be discussed here are those which do not already appear on this agenda. III. ITEMS FROM STAFF: A. Traffic Statistics for January & February 2024-2025 Recommended Action: Receive and File B. Updates on Various Projects/Programs Recommended Action: Receive and File MAY 8, 2025 PAGE 2 TRAFFIC AND TRANSPORTATION COMMISSION IV. NEW BUSINESS 1. “No Right Turn on Red” and “Yield to Pedestrians” Signage at Golden Springs Dr. & Golden Prados Dr. Recommended Action: Concur with staff’s recommendation to install "No Right Turn on Red" and "Turning Vehicles Yield to Pedestrians" signage at the intersection of Golden Springs Drive and Golden Prados Drive. V. STATUS OF PREVIOUS ACTION ITEMS VI. ITEMS FROM COMMISSIONERS: VII. SCHEDULE OF FUTURE CITY EVENTS: A. PLANNING COMMISSION MEETING – Tuesday, May 13, 2025 – 6:30 p.m., Diamond Hall Windmill Community Room, 21810 Copley Drive B. CITY COUNCIL MEETING – Tuesday, May 20, 2025 – 6:30 p.m., AQMD/ Government Auditorium, 21865 Copley Drive C. PARKS AND RECREATION COMMISSION MEETING – Thursday, May 22, 2025 – 6:30 p.m. – Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive D. MEMORIAL DAY HOLIDAY – Monday, May 26, 2025 - City offices will be closed in observance of the holiday. We will re-open Tuesday, May 28, 2025 at 7:30 a.m. E. PLANNING COMMISSION MEETING – Tuesday, May 27, 2025 – 6:30 p.m., Diamond Hall Windmill Community Room, 21810 Copley Drive F. CITY COUNCIL MEETING – Tuesday, June 3, 2025 – 6:30 p.m., AQMD/ Government Auditorium, 21865 Copley Drive G. PLANNING COMMISSION MEETING – Tuesday, June 10, 2025 – 6:30 p.m., Diamond Hall Windmill Community Room, 21810 Copley Drive H. CITY COUNCIL MEETING – Tuesday, June 17, 2025 – 6:30 p.m., AQMD/ Government Auditorium, 21865 Copley Drive I. PLANNING COMMISSION MEETING – Tuesday, June 24, 2025 – 6:30 p.m., Diamond Hall Windmill Community Room, 21810 Copley Drive J. CITY COUNCIL MEETING – Tuesday, July 1, 2025 – 6:30 p.m., AQMD/Government Auditorium, 21865 Copley Drive MAY 8, 2025 PAGE 3 TRAFFIC AND TRANSPORTATION COMMISSION K. 4TH OF JULY HOLIDAY – Friday, July 4, 2025 – City offices will be closed in observance holiday. We will re-open Monday, July 7, 2025 at 7:30 a.m. L. TRAFFIC & TRANSPORTATION COMMISSION MEETING – Thursday, July 10, 2025 p.m., Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive VIII. ADJOURNMENT TRAFFIC & TRANSPORTATION COMMISSION AGENDA REPORT AGENDA ITEM NUMBER: 1.A MEETING DATE: May 8, 2025 TO: Chair and Members of the Traffic and Transportation Commission FROM: David G. Liu, Public Works Director/City Engineer SUBJECT: T&T Commission Meeting Minutes of March 13, 2025 RECOMMENDATION: Receive and File Attached for your review and approval are the T&T Commission Meeting Minutes of March 13,2025. Attachments: 1. T&T Commission Meeting Minutes - 3-13-25 CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117 1.A Packet Pg. 6 CITY OF DIAMOND BAR MINUTES OF THE TRAFFIC & TRANSPORTATION COMMISSION DIAMOND BAR CITY HALL WINDMILL ROOM 21810 COPLEY DRIVE, DIAMOND BAR, CA 91765 MARCH 13, 2025 CALL TO ORDER: Chair Morales called the meeting to order at 6:30 p.m. PLEDGE OF ALLEGIANCE: Chair Morales led the Pledge of Allegiance ROLL CALL: Commissioners Gary Busteed, Amy Mao, Patrick Mercado, Vice-Chair Raphael Plunkett, Chair Romulo Morales ABSENT: None Staff present: David Liu, Public Works Director; Hal Ghafari, Public Works Manager/Assistant City Engineer; Christian Malpica, Associate Engineer (Traffic); Vivian Chen, Associate Engineer; Nicholas Delgado, Public Works Management Analyst; Marcy Hilario, Administrative Coordinator I. INTRODUCTION OF NEW COMMISSIONERS II. REORGANIZATION OF THE TRAFFIC & TRANSPORTATION COMMISSION Chair Morales nominated Commissioner Mercado to serve as Chair. C/Busteed seconded. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: C/Busteed, C/Mao, C/Mercado, C/Morales, C/Plunkett ABSENT: COMMISSIONERS: None ABSTAIN: COMMISSIONERS: None C/Busteed nominated Commissioner Morales to serve as Vice-Chair. C/Plunkett seconded. Motion carried by the following Roll Call vote: 1.A.a Packet Pg. 7 Attachment: T&T Commission Meeting Minutes - 3-13-25 (T&T Commission Meeting Minutes of March 13, 2025) MARCH 13, 2023 PAGE 2 T&T COMMISSION AYES: COMMISSIONERS: Busteed, Mao, Morales, Plunkett, Chair/ Mercado ABSENT: COMMISSIONERS: None ABSTAIN: COMMISSIONERS: None III. APPROVAL OF MINUTES: A. Traffic and Transportation Commission Special Meeting Minutes of December 12, 2024 C/Plunkett moved, C/Busteed seconded, to approve the Special Meeting Minutes of December 12, 2024. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Busteed, Plunkett, VC/Morales ABSENT: COMMISSIONERS: None ABSTAIN: COMMISSIONERS: C/Mao, Chair/Mercado IV. PUBLIC COMMENTS: Michael Kight, 23204 Antler Drive, Diamond Bar, CA 91765. Requested a “No Right Turn on Red” sign at the intersection of Golden Springs Dr. and Golden Prados Dr. Staff will look into the matter. V. ITEMS FROM STAFF: A. TRAFFIC STATISTICS – NOVEMBER & DECEMBER 2023/2024 C/Busteed moved, C/Plunkett seconded, to receive and file the November & December 2023/2024 Traffic Statistics Report. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Busteed, Mao, Plunkett, VC/ Morales, Chair/Mercado ABSENT: COMMISSIONERS: None ABSTAIN: COMMISSIONERS: None 1.A.a Packet Pg. 8 Attachment: T&T Commission Meeting Minutes - 3-13-25 (T&T Commission Meeting Minutes of March 13, 2025) MARCH 13, 2023 PAGE 3 T&T COMMISSION B. MONTHLY UPDATES OF VARIOUS PROJECTS/PROGRAMS: C/Plunkett moved and C/Busteed seconded to approve the Monthly Updates of Various Projects/Programs. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Busteed, Mao, Plunkett, VC/ Morales, Chair/Mercado ABSENT: COMMISSIONERS: None NOES: COMMISSIONERS: None VI. STATUS OF PREVIOUS ACTION ITEMS: None VII. ITEMS FROM COMMISSIONERS: C/Plunkett asked about new bike lanes information regarding e-bikes and scooters. Questions were answered by PWD/Liu. VIII. SCHEDULE OF FUTURE CITY EVENTS: As presented in the Agenda. IX. ADJOURNMENT: There being no further business to come before the Traffic and Transportation Commission, Chair/Morales adjourned the meeting at 7:19 p.m. to Thursday, May 8, 2025 at 6:30 p.m. The foregoing minutes are hereby approved this day of , 2025. Respectfully Submitted, ______________________________ David G. Liu, Secretary Attest: ___________________________________________ Chair Patrick Mercado 1.A.a Packet Pg. 9 Attachment: T&T Commission Meeting Minutes - 3-13-25 (T&T Commission Meeting Minutes of March 13, 2025) TRAFFIC & TRANSPORTATION COMMISSION AGENDA REPORT AGENDA ITEM NUMBER: 3.A MEETING DATE: May 8, 2025 TO: Chair and Members of the Traffic and Transportation Commission FROM: David G. Liu, Public Works Director/City Engineer SUBJECT: Traffic Statistics for January & February 2024-2025 RECOMMENDATION: Receive and File Attached for your review are the Traffic Statistics Reports for the months of January and February – 2024-2025 as submitted by the L.A. County Sheriff’s Department. Both years have been provided for side-by-side comparison. Attachments: 1. Traffic Statistics - Jan & Feb 2024-25 CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117 3.A Packet Pg. 10 3.A.aPacket Pg. 11Attachment: Traffic Statistics - Jan & Feb 2024-25 (Traffic Statistics for January & February 2024-2025) 3.A.aPacket Pg. 12Attachment: Traffic Statistics - Jan & Feb 2024-25 (Traffic Statistics for January & February 2024-2025) 3.A.aPacket Pg. 13Attachment: Traffic Statistics - Jan & Feb 2024-25 (Traffic Statistics for January & February 2024-2025) TRAFFIC & TRANSPORTATION COMMISSION AGENDA REPORT AGENDA ITEM NUMBER: 3.B MEETING DATE: May 8, 2025 TO: Chair and Members of the Traffic and Transportation Commission FROM: David G. Liu, Public Works Director/City Engineer SUBJECT: Updates on Various Projects/Programs RECOMMENDATION: Receive and File A. Grand Avenue and Golden Springs Drive Intersection Improvements Public Works continues to collaborate closely with the City of Industry, along with its project manager and inspectors, to ensure the successful completion of the Project. The majority of punch-list items have been successfully addressed, and SCE is now close to completing the final repairs needed to energize the streetlight poles. Once this work is completed, the city will be able to formally close out the Project. B. Highway Safety Improvement Program Grant Project The project has been successfully completed, with all final tasks and quality checks finalized. The Notice of Completion was officially filed with the City Council at the May 20th meeting, marking the formal conclusion of the project. The following intersections were upgraded as part of this effort: Diamond Bar Blvd & Sunset Crossing Rd, Diamond Bar Blvd & Golden Springs Dr, Diamond Bar Blvd & Pathfinder Rd, Diamond Bar Blvd & Brea Canyon Rd, Golden Springs Dr & Carpio Dr, Brea Canyon Rd & Golden Springs Dr, Grand Ave & Diamond Bar Blvd, and Pathfinder Rd & Fern Hollow Dr / Brea Canyon Rd. The final construction cost totaled $270,981.77, which is $30,644.23 under the CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117 3.B Packet Pg. 14 authorized amount of $301,626.00 (construction agreement: $251,355.00; contingency: $50,271.00). C. SR-57/60 Confluence Improvements Project A 59-hour closure was scheduled on Grand Avenue as part of the State Route 57/60 Confluence Project. This closure affected the southbound lanes on the Grand Avenue Bridge and the eastbound SR-60 Grand Avenue off-ramp. The closure began the night of Friday, May 2, 2025, and continued through the morning of Monday, May 5, 2025. Planned work included utility relocations, roadway excavation, paving, and striping. Meanwhile, construction continues on the Golden Springs Drive undercrossing, including work on the bridge stem and soffit, retaining wall foundations and footings along eastbound SR-60, storm drain relocations at various locations, roadway improvements on Grand Avenue, and utility relocations along Grand Avenue. These activities require intermittent daytime closures and full nighttime detours. To keep the community informed, City staff, in coordination with the Community Relations team, continues to provide timely updates regarding these closures. 3.B Packet Pg. 15 TRAFFIC & TRANSPORTATION COMMISSION AGENDA REPORT AGENDA ITEM NUMBER: 4.1 MEETING DATE: May 8, 2025 TO: Chair and Members of the Traffic and Transportation Commission FROM: David G. Liu, Public Works Director/City Engineer SUBJECT: “No Right Turn on Red” and “Yield to Pedestrians” Signage at Golden Springs Dr. & Golden Prados Dr. RECOMMENDATION: Staff recommends that the Traffic and Transportation Commission concur with the installation of "No Right Turn on Red" and "Turning Vehicles Yield to Pedestrians" signage at the intersection of Golden Springs Drive and Golden Prados Drive, and receive and file this memorandum along with the attached supporting technical memo. BACKGROUND/DISCUSSION: In response to ongoing vehicle-pedestrian conflicts at the intersection of Golden Springs Drive and Golden Prados Drive, staff proposes the installation of targeted traffic control signage to enhance pedestrian safety and address restricted sight distance issues for turning vehicles. A recent field evaluation by the City’s traffic consultant identified several concerns, including limited sight distance for eastbound right-turning vehicles from Golden Prados Drive, obstructed by residential walls along Golden Springs Drive. Drivers were frequently observed encroaching into the crosswalk to improve visibility, increasing the potential for conflicts with pedestrians. Although overall pedestrian volumes were low, consistent pedestrian activity was observed due to nearby transit stops and ci ty park. Additionally, conflicts were reported by the public involving westbound vehicles failing to CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117 4.1 Packet Pg. 16 yield to pedestrians crossing Golden Springs Drive. While the consultant recommended installing "Turning Vehicles Yield to Pedestrians" signage, City staff determined that the combination of restricted visibility, operational risks, engineering judgment, limited community access points, and pedestrian exposure warrants a more proactive safety approach. Staff recommends with the concurrence of the consultant to installing a "No Right Turn on Red" sign on the signal pole located at the southeast corner of the intersection to control eastbound right -turning vehicles exiting Golden Prados Drive. A "Yield to Pedestrians" sign is also proposed for installation at the northwest corner to address westbound turning movements. The "No Right Turn on Red" signage is intended to minimize pedestrian exposure in the crosswalk and reduce conflicts with high-speed southbound through traffic, so eliminating rolling right turns and improving overall intersection safety. Similarly, the "Yield to Pedestrians" signage will reinforce the need for turning vehicles to yield to pedestrians within the crosswalks. This combined strategy is intended to enhance pedestrian protection, address visibility limitations for turning vehicles, and improve overall compliance with right -of-way rules at the intersection. While consistent with the consultant’s findings, the staff’s recommendation reflects a more proactive and comprehensive approach based on engineering judgment and observed field conditions. RECOMMENDATION: Staff recommends that the Traffic and Transportation Commission concur with the installation of "No Right Turn on Red" and "Turning Vehicles Yield to Pedestrians" signage at the intersection of Golden Springs Drive and Golden Prados Drive, and receive and file this memorandum along with the attached supporting technical memo. Attachments: 1. Vicinity Map - Regulatory Signs 2. Attachment - Signage Assessment for Golden Springs-Golden Prados Memo 4.1 Packet Pg. 17 Vicinity Map SHEET 1 OF 1 Regulatory Signs at Golden Springs Drive & GoldenPrados Drive DATE: 5-1-2025PREPARED BY: CMP 4.1.a Packet Pg. 18 Attachment: Vicinity Map - Regulatory Signs (“No Right Turn on Red” and “Yield to Pedestrians” Signage at Golden Springs Drive & Golden kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 TECHNICAL MEMORANDUM To: Christian Malpica, Associate Engineer, City of Diamond Bar From: Sowmya Chandrasekhar, P.E., T.E., PTOE Ruben Becerra, P.E. Date: April 28, 2025 Subject: Signage Assessment at Golden Springs Drive & Golden Prados Drive Intersection 1.0 I NTRODUCTION Kimley-Horn and Associates, Inc. (“Kimley-Horn”) has been retained by the City of Diamond Bar (“City”) to prepare a signage assessment at the intersection of Golden Springs Drive and Golden Prados Drive (“study intersection”). The City intends to evaluate addition of signage at the study intersection based on community input, specifically pedestrian safety concern for vehicles making eastbound or westbound turns from Golden Springs Drive. Driver compliance of right-turning vehicles yielding to pedestrian was documented for each minor street approach. The analysis is based on the criteria listed in the California Manual on Uniform Traffic Control Devices (CA MUTCD), Section 2B.4, and California Department of Transportation (Caltrans) Highway Design Manual (HDM) guidelines, Chapters 200 and 400 . The aerial view of the study intersection is shown in Exhibit 1. Exhibit 1 – Study Intersection: Golden Springs Drive and Golden Prados Drive 4.1.b Packet Pg. 19 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Page 2 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 2.0 E XISTING C ONDITIONS The study intersection is a four-legged signalized intersection, with Golden Springs Drive running primarily in the north -south direction and Golden Prados Drive running primarily in the east-west direction in the vicinity of the study intersection. The posted speed limit within the study area is 45 miles per hour on Golden Springs Drive and 25 miles per hour on Golden Prados Drive. The study intersection is located on a horizontal curve along Golden Springs Drive. During the field visits, it was observed that the Golden Prados Drive approach line of sight of vehicles approaching on Golden Springs Drive approaches is limited by residential walls at all four corners of the intersection. Exhibits 2 and 3 illustrate the eastbound and westbound Golden Prados Drive right-turning vehicles creeping beyond the limit line, encroaching the marked crosswalks, in order to gain a better line of sight of vehicles approaching on Golden Springs Drive. The sight lines for westbound Golden Prados Drive are further blocked by the bus shelter along northbound Golden Springs Drive. Exhibit 2 – Limited Sight Distance of Southbound Golden Springs Dr for Eastbound Golden Prados Dr Vehicles Exhibit 3 – Limited Sight Distance of Northbound Golden Springs Dr for Westbound Golden Prados Dr Vehicles 4.1.b Packet Pg. 20 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Page 3 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 Turning movement counts (TMCs), including vehicles, pedestrian, and bicycle volumes, were collected on Thursday, January 30, 2025, for 2-hour morning (7 to 9 AM) and evening (4 to 6 PM) peak periods. The peak hour vehicle, pedestrian and bicycle volumes are illustrated in Exhibit 4. The detailed data is included in Appendix A. Exhibit 4 – Study Intersection Volumes As shown in Exhibit 4 and Appendix A, there were no pedestrians crossing the south leg during AM and PM peak hours, with only one pedestrian using the south leg during the entire 4-hour period that the traffic volumes were collected at the intersection. No pedestrians were observed to cross at the north leg crosswalk during the AM peak period (7 to 9 AM) and a total of five pedestrians crossed at the south leg crosswalk during the PM peak period (4 to 6 PM), with three crossing during the peak hour (5 to 6 PM). It is noted that there are two nearside bus stops along northbound and southbound Golden Springs Drive on its approaches to Golden Prados Drive. These bus stops serve Foothill Transit bus routes 482 and 853. Kimley -Horn conducted a field visit on Tuesday, February 11, 2025, during the evening peak period (4 to 5 PM) to observe traffic operations. During this field visit, no conflict between pedestrians and vehicles was observed. In addition, collision data from University of California Berkeley Transportation Injury Mapping System (TIMS) was obtained for a 10 -year period from January 1, 2014 to December 31, 2023. Out of the three reported collisions at this intersection in a 10-year period, one involved a pedestrian and vehicle making an eastbound left -turn in the year 2016. 3.0 E VALUATION For this study, the following references were used to analyze the existing conditions and determine the proposed treatments - Caltrans HDM Chapter 200 , Topic 201 and Chapter 400, Section 405.1.2.b., and CA MUTCD, Section 2B. C ALTRANS HDM G UIDELINES Chapter 200, Table 201.1, shown in Exhibit 5, provides the minimum standards for stopping sight distance related to design speed for motorists. 4.1.b Packet Pg. 21 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Page 4 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 Exhibit 5 – Caltrans HDM Sight Distance Standards (Chapter 200, Table 201.1) Chapter 400, Section 405.1.2.b states that a t signalized intersections the corner sight distances should also be applied whenever possible. Even though traffic flows are designed to move at separate times, unanticipated conflicts can occur due to violation of signal, right turns on red, malfunction of the signal, or use of flashing red/yellow mode. The minimum value for corner sight distance at signalized intersections should be equal to the stopping sight distance as given in Table 201.1. E VALUATION B ASED ON HDM : A substantially clear line of sight per HDM should be provided and maintained within the public right of way. In this case, the corner line of sight at the intersection should equal that of the stopping sight distance for the major street (Golden Springs Drive). This distance allows minor street vehicles at the limit line to ideally have enough visibility to make a safe decision and proceed through the intersections. Per table 201.1, a clear line of sight distance of 360 feet is required for vehicles on Golden Prados Drive approaches. The existing conditions (walls and bus stop shelter) for southbound and northbound restrict this distance to less than 300 feet, due to which the eastbound and westbound Golden Prados Drive right-turning vehicles pull forward into the crosswalk to gain a better line of sight. CA MUTCD G UIDELINES Per CA MUTCD Section 2B.54, a No Turn on Red (R10-11, R13A(CA) or R13B(CA)) sign should be considered when an engineering study finds that one or more of the following conditions exists: A. Inadequate sight distance to vehicles approaching from the left (or right, if applicable); B. Geometrics or operational characteristics of the intersection that might result in unexpected conflicts; C. An exclusive pedestrian phase; D. An unacceptable number of pedestrian conflicts with right-turn -on-red maneuvers, especially involving children, older pedestrians, or persons with disabilities; 4.1.b Packet Pg. 22 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Page 5 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 E. More than three right-turn-on-red accidents reported in a 12-month period for the particular approach; or F. The skew angle of the intersecting roadways creates difficulty for drivers to see traffic approaching from their left. Per CA MUTCD Section 2B.53.09, in order to remind drivers who are making turns to yield to pedestrians, a Turning Vehicles Yield to Pedestrians (R10-15) sign may be used. However, it is noted that Federal Highway Administration (FHWA) interpretation of the R10-15 sign is for use at signalized intersections that might warrant additional emphasis to drivers turning at a signal where potential pedestrian conflicts might not be readily apparent. E VALUATION BASED ON CA MUTCD: The installation of Turning Vehicles Yield to Pedestrians (R10-15) sign may be considered to provide additional emphasis to turning drivers. However, based on CA MUTCD guidelines, Conditions A and B are met for consideration of No Turn on Red (R10-11, R13A(CA) or R13B(CA)) sign. It is noted that based on the traffic volumes collected, the right turn is the predominant movement on the eastbound/westbound Golden Prados Drive with most of the vehicles exiting the residential neighborhoods heading southbound on Golden Springs Drive. The pedestrian volume during the peak hour is significantly low (< 5 during an hour). Hence, installing a No Turn on Red sign for the eastbound approach is expected to cause some delays to vehicles making a right turn onto Golden Springs Drive. 4.0 C ONCLUSIONS Based on the field conditions, no conflicts between eastbound/westbound right-turning vehicles and pedestrians were observed. Additionally, no collisions have been reported in a 10-year period from 2014 to 2023 involving a right-turning vehicle and pedestrian. Considering the low pedestrian volumes and restricted sight distance for eastbound/westbound Golden Prados Drive, alternatives such as leading pedestrian interval are not recommended to be ideal solutions. Further, removal of south leg crosswalk was not considered due to the presence of nearside bus stops on northbound and southbound Golden Springs Drive approaches despite significantly low pedestrian volumes on the south leg. Two conditions for the consideration of a No Turn on Red (R10-11, R13A(CA) or R13B(CA)) sign are met per CA MUTCD guidelines. Per discussion with the City, R13A(CA) sign is recommended to be installed on the far side signal pole where it will be visible for the eastbound right- turn movement, as shown in Exhibit 6. In addition, City recommends installing R10-15 sign on the far side signal pole facing westbound approach. Exhibit 6 – Recommended installation locations of proposed signs R13A(CA) R10-15 4.1.b Packet Pg. 23 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Page 6 kimley-horn.com 660 South Figueroa Street, Suite 2050, Los Angeles, CA 90017 213-261-4040 A PPENDIX A: T URNING M OVEMENT C OUNTS D ATA 4.1.b Packet Pg. 24 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” File Name : DMB_GS_GP AM Site Code : 10825089 Start Date : 1/30/2025 Page No : 1 City of Diamond Bar N/S: Golden Springs Drive E/W: Golden Prados Drive Weather: Clear Groups Printed- Total Volume Golden Springs Drive Southbound Golden Prados Drive Westbound Golden Springs Drive Northbound Golden Prados Drive Eastbound Start Time Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Int. Total 07:00 AM 1 131 0 132 17 1 1 19 0 28 3 31 0 2 7 9 191 07:15 AM 1 183 1 185 16 1 3 20 3 44 3 50 1 0 2 3 258 07:30 AM 2 203 0 205 25 0 3 28 2 61 7 70 2 2 8 12 315 07:45 AM 6 203 0 209 24 0 19 43 2 102 9 113 2 3 10 15 380 Total 10 720 1 731 82 2 26 110 7 235 22 264 5 7 27 39 1144 08:00 AM 6 204 3 213 23 2 5 30 2 71 5 78 4 0 9 13 334 08:15 AM 4 156 2 162 10 3 3 16 3 67 6 76 1 1 4 6 260 08:30 AM 4 121 1 126 21 0 3 24 3 53 3 59 1 0 2 3 212 08:45 AM 2 154 0 156 11 0 3 14 1 66 4 71 1 2 7 10 251 Total 16 635 6 657 65 5 14 84 9 257 18 284 7 3 22 32 1057 Grand Total 26 1355 7 1388 147 7 40 194 16 492 40 548 12 10 49 71 2201 Apprch %1.9 97.6 0.5 75.8 3.6 20.6 2.9 89.8 7.3 16.9 14.1 69 Total %1.2 61.6 0.3 63.1 6.7 0.3 1.8 8.8 0.7 22.4 1.8 24.9 0.5 0.5 2.2 3.2 Golden Springs Drive Southbound Golden Prados Drive Westbound Golden Springs Drive Northbound Golden Prados Drive Eastbound Start Time Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Int. Total Peak Hour Analysis From 07:00 AM to 08:45 AM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 07:30 AM 07:30 AM 2 203 0 205 25 0 3 28 2 61 7 70 2 2 8 12 315 07:45 AM 6 203 0 209 24 0 19 43 2 102 9 113 2 3 10 15 380 08:00 AM 6 204 3 213 23 2 5 30 2 71 5 78 4 0 9 13 334 08:15 AM 4 156 2 162 10 3 3 16 3 67 6 76 1 1 4 6 260 Total Volume 18 766 5 789 82 5 30 117 9 301 27 337 9 6 31 46 1289 % App. Total 2.3 97.1 0.6 70.1 4.3 25.6 2.7 89.3 8 19.6 13 67.4 PHF .750 .939 .417 .926 .820 .417 .395 .680 .750 .738 .750 .746 .563 .500 .775 .767 .848 Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 (951) 268-6268 4.1.b Packet Pg. 25 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” File Name : DMB_GS_GP AM Site Code : 10825089 Start Date : 1/30/2025 Page No : 2 City of Diamond Bar N/S: Golden Springs Drive E/W: Golden Prados Drive Weather: Clear Golden Springs Drive Golden Prados Drive Golden Prados Drive Golden Springs Drive Right 5 Thru 766 Left 18 InOut Total 340 789 1129 Right30 Thru5 Left82 OutTotalIn51 117 168 Left 9 Thru 301 Right 27 Out TotalIn 879 337 1216 Left9 Thru6 Right31 TotalOutIn19 46 65 Peak Hour Begins at 07:30 AM Total Volume Peak Hour Data North Peak Hour Analysis From 07:00 AM to 08:45 AM - Peak 1 of 1 Peak Hour for Each Approach Begins at: 07:15 AM 07:15 AM 07:30 AM 07:30 AM +0 mins.1 183 1 185 16 1 3 20 2 61 7 70 2 2 8 12 +15 mins.2 203 0 205 25 0 3 28 2 102 9 113 2 3 10 15 +30 mins.6 203 0 209 24 0 19 43 2 71 5 78 4 0 9 13 +45 mins.6 204 3 213 23 2 5 30 3 67 6 76 1 1 4 6 Total Volume 15 793 4 812 88 3 30 121 9 301 27 337 9 6 31 46 % App. Total 1.8 97.7 0.5 72.7 2.5 24.8 2.7 89.3 8 19.6 13 67.4 PHF .625 .972 .333 .953 .880 .375 .395 .703 .750 .738 .750 .746 .563 .500 .775 .767 Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 (951) 268-6268 4.1.b Packet Pg. 26 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” File Name : DMB_GS_GP PM Site Code : 10825089 Start Date : 1/30/2025 Page No : 1 City of Diamond Bar N/S: Golden Springs Drive E/W: Golden Prados Drive Weather: Clear Groups Printed- Total Volume Golden Springs Drive Southbound Golden Prados Drive Westbound Golden Springs Drive Northbound Golden Prados Drive Eastbound Start Time Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Int. Total 04:00 PM 3 67 1 71 6 0 3 9 2 167 12 181 4 2 3 9 270 04:15 PM 4 94 0 98 11 2 5 18 3 206 9 218 3 0 3 6 340 04:30 PM 4 112 2 118 8 1 7 16 7 177 12 196 2 0 6 8 338 04:45 PM 2 89 0 91 8 1 5 14 1 150 12 163 0 0 2 2 270 Total 13 362 3 378 33 4 20 57 13 700 45 758 9 2 14 25 1218 05:00 PM 2 87 0 89 8 1 2 11 4 211 18 233 1 1 3 5 338 05:15 PM 7 97 0 104 10 1 3 14 3 203 10 216 0 2 8 10 344 05:30 PM 6 81 1 88 13 1 3 17 3 191 20 214 1 1 0 2 321 05:45 PM 7 96 2 105 13 1 5 19 3 210 17 230 1 0 4 5 359 Total 22 361 3 386 44 4 13 61 13 815 65 893 3 4 15 22 1362 Grand Total 35 723 6 764 77 8 33 118 26 1515 110 1651 12 6 29 47 2580 Apprch %4.6 94.6 0.8 65.3 6.8 28 1.6 91.8 6.7 25.5 12.8 61.7 Total %1.4 28 0.2 29.6 3 0.3 1.3 4.6 1 58.7 4.3 64 0.5 0.2 1.1 1.8 Golden Springs Drive Southbound Golden Prados Drive Westbound Golden Springs Drive Northbound Golden Prados Drive Eastbound Start Time Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Left Thru Right App. Total Int. Total Peak Hour Analysis From 04:00 PM to 05:45 PM - Peak 1 of 1 Peak Hour for Entire Intersection Begins at 05:00 PM 05:00 PM 2 87 0 89 8 1 2 11 4 211 18 233 1 1 3 5 338 05:15 PM 7 97 0 104 10 1 3 14 3 203 10 216 0 2 8 10 344 05:30 PM 6 81 1 88 13 1 3 17 3 191 20 214 1 1 0 2 321 05:45 PM 7 96 2 105 13 1 5 19 3 210 17 230 1 0 4 5 359 Total Volume 22 361 3 386 44 4 13 61 13 815 65 893 3 4 15 22 1362 % App. Total 5.7 93.5 0.8 72.1 6.6 21.3 1.5 91.3 7.3 13.6 18.2 68.2 PHF .786 .930 .375 .919 .846 1.00 .650 .803 .813 .966 .813 .958 .750 .500 .469 .550 .948 Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 (951) 268-6268 4.1.b Packet Pg. 27 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” File Name : DMB_GS_GP PM Site Code : 10825089 Start Date : 1/30/2025 Page No : 2 City of Diamond Bar N/S: Golden Springs Drive E/W: Golden Prados Drive Weather: Clear Golden Springs Drive Golden Prados Drive Golden Prados Drive Golden Springs Drive Right 3 Thru 361 Left 22 InOut Total 831 386 1217 Right13 Thru4 Left44 OutTotalIn91 61 152 Left 13 Thru 815 Right 65 Out TotalIn 420 893 1313 Left3 Thru4 Right15 TotalOutIn20 22 42 Peak Hour Begins at 05:00 PM Total Volume Peak Hour Data North Peak Hour Analysis From 04:00 PM to 05:45 PM - Peak 1 of 1 Peak Hour for Each Approach Begins at: 04:30 PM 05:00 PM 05:00 PM 04:00 PM +0 mins.4 112 2 118 8 1 2 11 4 211 18 233 4 2 3 9 +15 mins.2 89 0 91 10 1 3 14 3 203 10 216 3 0 3 6 +30 mins.2 87 0 89 13 1 3 17 3 191 20 214 2 0 6 8 +45 mins.7 97 0 104 13 1 5 19 3 210 17 230 0 0 2 2 Total Volume 15 385 2 402 44 4 13 61 13 815 65 893 9 2 14 25 % App. Total 3.7 95.8 0.5 72.1 6.6 21.3 1.5 91.3 7.3 36 8 56 PHF .536 .859 .250 .852 .846 1.000 .650 .803 .813 .966 .813 .958 .563 .250 .583 .694 Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 (951) 268-6268 4.1.b Packet Pg. 28 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Location: Date: 1/30/2025 N/S: Day: Thursday E/W: North Leg East Leg South Leg West Leg Golden Springs Drive Golden Prados Drive Golden Springs Drive Golden Prados Drive Pedestrians Pedestrians Pedestrians Pedestrians 01001 01012 00000 01001 01012 00000 01012 00000 05038 North Leg East Leg South Leg West Leg Golden Springs Drive Golden Prados Drive Golden Springs Drive Golden Prados Drive Pedestrians Pedestrians Pedestrians Pedestrians 22127 00022 02002 00000 05005 20035 10001 02002 5111 724 5:15 PM 5:30 PM 5:45 PM TOTAL VOLUMES: 4:00 PM 4:15 PM 4:30 PM 4:45 PM 5:00 PM 7:00 AM 7:15 AM 7:30 AM 7:45 AM TOTAL VOLUMES: 8:00 AM 8:15 AM 8:30 AM 8:45 AM Diamond Bar Golden Springs Drive Golden Prados Drive PEDESTRIANS Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 951-268-6268 4.1.b Packet Pg. 29 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians” Location: Date: 1/30/2025 N/S: Day: Thursday E/W: Left Thru Right Left Thru Right Left Thru Right Left Thru Right 000000000000 0 020000000000 2 000000000000 0 000000000000 0 000000000000 0 000000000000 0 000000000000 0 000000000000 0 020000000000 2 Left Thru Right Left Thru Right Left Thru Right Left Thru Right 000000000000 0 000000000000 0 010000010000 2 000000000000 0 000000000000 0 000000030001 4 000000000000 0 000000000000 0 010000040001 6 Golden Prados Drive TOTAL VOLUMES: Golden Springs Drive Golden Prados Drive Golden Springs Drive Golden Prados Drive Southbound Westbound Northbound Eastbound 5:30 PM 5:45 PM Golden Springs Drive Golden Prados Drive Golden Springs Drive Eastbound TOTAL VOLUMES: 4:00 PM 4:15 PM 4:30 PM 4:45 PM 5:00 PM 5:15 PM 7:45 AM 8:00 AM 8:15 AM 8:30 AM 8:45 AM Southbound Westbound Northbound Golden Prados Drive Golden Springs Drive Diamond Bar BICYCLES 7:30 AM 7:00 AM 7:15 AM Counts Unlimited, Inc. PO Box 1178 Corona, CA 92878 951-268-6268 4.1.b Packet Pg. 30 Attachment: Attachment - Signage Assessment for Golden Springs-Golden Prados Memo (“No Right Turn on Red” and “Yield to Pedestrians”