The URL can be used to link to this page

Home My WebLink AboutT&T Commission Agenda Packet 9-11-25________________________________________________________________________________________________________________________ City of Diamond Bar Traffic and Transportation Commission City of Diamond Bar Traffic and Transportation Commission Agenda Patrick Mercado, Chair Romulo Morales, Vice-Chair Gary Busteed, Commissioner Amy Mao, Commissioner Raphael Plunkett, Commissioner Meeting Date: Thursday, September 11, 2025 Regular Meeting 6:30 p.m. Diamond Bar City Hall – Windmill Community Room 21810 Copley Drive, Diamond Bar CA 91765 WELCOME TO A MEETING OF THE DIAMOND BAR TRAFFIC AND TRANSPORTATION COMMISSION Meetings are open to the public, and you are invited to attend and participate. 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. The Traffic and Transportation Commission may take action on any item listed on the agenda. HOW TO ACCESS THE MEETING REMOTELY Listen-Only: Call +1 (415) 930-5321, Access Code: 227-051-579 Participate: Join Go To Webinar (https://attendee.gotowebinar.com/register/4979873329901255768) RESOURCES Copies of agendas and agenda packets are on file and available for public inspection in the Public Works Department at 21810 Copley Drive, Diamond Bar, CA 91765 or online at www.diamondbarca.gov/agendas. For more information about the agendas or rules of the Traffic and Transportation Commission, please email the Public Works Department (publicworks@diamondbarca.gov) or call 909-839-7040. AMERICANS WITH DISABILITY ACT ACCOMMODATION In compliance with the Americans with Disabilities Act, if you need special assistance, a disability- related modification or accommodation, agenda materials in an alternative format, or auxiliary aids to participate in this meeting, please email the Public Works Department (publicworks@diamondbarca.gov) or call 909-839-7040 as soon as possible. Providing at least 72 hours’ notice will help ensure that reasonable arrangements can be made. PUBLIC INPUT The public may provide public comment by attending the meeting in person, by sending an email, or by logging into the teleconference. Please email the Public Works Department Page 1 of 15 Diamond Bar Traffic and Transportation Commission Agenda September 11, 2025 ________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ City of Diamond Bar Traffic and Transportation Commission (publicworks@diamondbarca.gov) by 4:00 p.m. on the day of the meeting and indicate in the Subject Line “FOR PUBLIC COMMENT.” Written comments will be distributed to the Traffic and Transportation Commission and noted for the record at the meeting. Please note that the meeting will proceed at Diamond Bar City Hall – Windmill Community Room should comment by teleconferencing become infeasible due to an internet or power outage or due to technical problems outside the City's control. If you wish to make certain that your comments are heard, please attend the meeting in person or send an email by 4:00 p.m. on the day of the meeting/hearing. Speakers are limited to five (5) minutes per agenda item, unless the Chairperson determines otherwise. The Chairperson 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 considerations. Speakers may address the Traffic and Transportation Commission only once on an agenda item, except during public hearings, when the applicant/appellant may be afforded a rebuttal. Any materials to be submitted to the Traffic and Transportation Commission at the meeting should be submitted through the Administrative Coordinator. Public comments must be directed to the Traffic and Transportation Commission. A person who disrupts the orderly conduct of the meeting after being warned by the Chairperson or the Chairperson’s designee that their behavior is disrupting the meeting, may result in the person being removed from the meeting. Page 2 of 15 Diamond Bar Traffic and Transportation Commission Agenda September 11, 2025 ________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ City of Diamond Bar Traffic and Transportation Commission 1. CALL TO ORDER: 6:30 p.m., Windmill Room PLEDGE OF ALLEGIANCE: Commissioner Busteed ROLL CALL: Commissioners Busteed, Mao, Plunkett, Vice-Chair Morales, Chair Mercado 2. PUBLIC COMMENTS: “Public Comments” is the time reserved on each regular meeting agenda to provide an opportunity for members of the public to directly address the Traffic and Transportation Commission on Consent Calendar items or other matters of interest not on the agenda that are within the subject matter jurisdiction of the Traffic and Transportation Commission. Although the Traffic and Transportation Commission values your comments, pursuant to the Brown Act, members of the Traffic and Transportation Commission may briefly respond to public comments if necessary, but no extended discussion and no action on such matters may take place. There is a five-minute maximum time limit when addressing the Traffic and Transportation Commission. 3. APPROVAL OF MINUTES: 3.1 T&T Commission Meeting Minutes of July 10, 2025 Recommended Action: Receive and File 4. ITEMS FROM STAFF: 4.1 Traffic Statistics for the Months of June & July 2024-2025 Recommended Action: Receive and File 4.2 Updates on Various Projects/Programs Recommended Action: Receive and File 5. OLD BUSINESS: 6. NEW BUSINESS: 7. STATUS OF PREVIOUS ACTION ITEMS: 8. TRAFFIC AND TRANSPORTATION COMMISSION COMMENTS/INFORMATION ITEMS: 9. SCHEDULE OF FUTURE EVENTS: 9.1 City Council Meeting - September 16, 2025 - 6:30 p.m., online teleconference and SCAQMD Main Auditorium, 21865 Copley Dr. 9.2 Planning Commission Meeting - September 23, 2025 - 6:30 p.m., online teleconference and City Hall Windmill Room, 21810 Copley Dr. Page 3 of 15 Diamond Bar Traffic and Transportation Commission Agenda September 11, 2025 ________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ City of Diamond Bar Traffic and Transportation Commission 9.3 Parks & Recreation Commission Meeting - September 25, 2025 - 6:30 p.m., online teleconference and City Hall Windmill Room, 21810 Copley Dr. 9.4 City Council Meeting - October 7, 2025 - 6:30 p.m., online teleconference and SCAQMD Main Auditorium, 21865 Copley Dr. 9.5 Planning Commission Meeting - October 14, 2025 - 6:30 p.m., online teleconference and City Hall Windmill Room, 21810 Copley Dr. 9.6 City Council Meeting - October 21, 2025 - 6:30 p.m., online teleconference and SCAQMD Main Auditorium, 21865 Copley Dr. 9.7 Planning Commission Meeting - October 28, 2025 - 6:30 p.m., online teleconference and City Hall Windmill Room, 21810 Copley Dr. 9.8 City Council Meeting - November 4, 2025 - 6:30 p.m., online teleconference and SCAQMD Main Auditorium, 21865 Copley Dr. 9.9 Veterans Recognition Ceremony - Thursday, November 6, 2025 - 9:00-11:00 a.m., Diamond Bar Center, Grand Ballroom, 1600 Grand Ave. 9.10 Veterans Day (Observed) - November 11, 2025 - City offices will be closed. 9.11 Traffic & Transportation Commission Meeting - November 13, 2025 - 6:30 p.m., online teleconference and City Hall Windmill Room, 21810 Copley Dr. 10. ADJOURNMENT: CERTIFICATION I, Marcy Hilario, Administrative Coordinator, City of Diamond Bar, hereby certify, under penalty of perjury under the laws of the State of California that the foregoing notice was posted pursuant to Government Code Section 54950 Et. Seq., not less than 72 hours prior to the meeting, at the following locations: Diamond Bar City Hall Kiosk, Diamond Bar City Hall Bulletin Board, City website: www.diamondbarca.gov, and Diamond Bar Library. Marcy Hilario Administrative Coordinator Date Posted: September 04, 2025 Page 4 of 15 Agenda Item #: 3.1 Meeting Date: September 11, 2025 TRAFFIC AND TRANSPORTATION COMMISSION AGENDA REPORT 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 July 10, 2025 RECOMMENDATION: Receive and File BACKGROUND/DISCUSSION: Attached are the T&T Commission Meeting Minutes of July 10, 2025, for your review and approval. PREPARED BY: David G. Liu, Public Works Director/City Engineer, Public Works ATTACHMENTS: 1. T&T Commission Meeting Minutes 7-10-25 Page 5 of 15 CITY OF DIAMOND BAR MINUTES OF THE TRAFFIC & TRANSPORTATION COMMISSION DIAMOND BAR CITY HALL WINDMILL ROOM 21810 COPLEY DRIVE, DIAMOND BAR, CA 91765 JULY 10, 2025 CALL TO ORDER: Chair Mercado called the meeting to order at 6:31 p.m. PLEDGE OF ALLEGIANCE: Commissioner Plunkett led the Pledge of Allegiance ROLL CALL: Commissioners Amy Mao, Raphael Plunkett, Vice-Chair Romulo Morales, Chair Patrick Mercado ABSENT: Commissioner Gary Busteed Staff present: David Liu, Public Works Director; Hal Ghafari, Public Works Manager/Assistant City Engineer; Christian Malpica, Associate Engineer (Traffic); Nicholas Delgado, Public Works Management Analyst; Marcy Hilario, Administrative Coordinator I. APPROVAL OF MINUTES: A. Traffic and Transportation Commission Meeting Minutes of May 8, 2025 C/Plunkett moved, C/Mao seconded, to approve the Meeting Minutes of May 8, 2025. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Mao, Plunkett, Chair/Mercado ABSENT: COMMISSIONERS: Busteed ABSTAIN: COMMISSIONERS: VC/Morales II. PUBLIC COMMENTS: None Page 6 of 15 JULY 10, 2025 PAGE 2 T&T COMMISSION III. ITEMS FROM STAFF: A. TRAFFIC STATISTICS – MARCH & APRIL 2025 C/Plunkett moved, VC/Morales seconded, to receive and file the March & April 2025 Traffic Statistics Report. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Mao, Plunkett, VC/Morales, Chair/ Mercado ABSENT: COMMISSIONERS: Busteed ABSTAIN: COMMISSIONERS: None B. MONTHLY UPDATES OF VARIOUS PROJECTS/PROGRAMS: C/Plunkett moved and VC/Morales seconded to approve the Monthly Updates of Various Projects/Programs. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Mao, Plunkett, VC/Morales, Chair/ Mercado ABSENT: COMMISSIONERS: Busteed NOES: COMMISSIONERS: None IV. NEW BUSINESS: None V. OLD BUSINESS: NTMP HAWKWOOD – STOP SIGN & PAVEMENT LEGENDS Speakers: Ken Santolla, Resident Gay-Kuen Tang, Resident Neeta Kochhar, Resident Madelyn Friedman, Resident An additional stop sign was requested at the T-intersection of Barbi Lane with Hawkwood Road. Page 7 of 15 JULY 10, 2025 PAGE 3 T&T COMMISSION RECOMMENDATION: Concur with the installation of (3) stop signs and associated legend markings at the intersections of Barbi Lane, Chirping Sparrow Road, and Ambusher Street with Hawkwood Road. C/Plunkett moved and C/Mao seconded to approve the recommendation. Motion carried by the following Roll Call vote: AYES: COMMISSIONERS: Mao, Plunkett, VC/Morales Chair/ Mercado ABSENT: COMMISSIONERS: Busteed NOES: COMMISSIONERS: None VI. STATUS OF PREVIOUS ACTION ITEMS: None VII. ITEMS FROM COMMISSIONERS: None 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/Mercado adjourned the meeting at 8:26 p.m. to Thursday, September 11, 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 Page 8 of 15 Agenda Item #: 4.1 Meeting Date: September 11, 2025 TRAFFIC AND TRANSPORTATION COMMISSION AGENDA REPORT TO: Chair and Members of the Traffic and Transportation Commission FROM: David G. Liu, Public Works Director/City Engineer SUBJECT: Traffic Statistics for the Months of June & July 2024-2025 RECOMMENDATION: Receive and File BACKGROUND/DISCUSSION: Attached for your review are the Traffic Statistics for the months of June & July 2025, as provided by the L.A. County Sheriff's Department. PREPARED BY: David G. Liu, Public Works Director/City Engineer, Public Works ATTACHMENTS: 1. Traffic Statistics - June-July 2024-2025 Page 9 of 15 Page 10 of 15 Page 11 of 15 Page 12 of 15 Agenda Item #: 4.2 Meeting Date: September 11, 2025 TRAFFIC AND TRANSPORTATION COMMISSION AGENDA REPORT 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 BACKGROUND/DISCUSSION: A. Area 4 Residential, Collector and Arterial Paving Improvement Project The contractor has since completed the work within the Area 4 residential area and has started preliminary work on the arterial streets. Main arterial construction is now scheduled for mid-September due to delays associated with the Caltrans rider permit process and material availability. Project completion is anticipated in early October 2025. B. CDBG Area 5 Residential ADA Curb Ramp Improvement Project The CDBG Area 5 Project has been completed, with six (6) new ADA-compliant curb ramps constructed in the Golden Springs Elementary School neighborhood. A Notice of Completion has been filed. C. SR-57/60 Confluence Improvements Project Construction for the SR-57/60 Interchange Improvements is progressing. As part of the ongoing project, the existing eastbound SR-60 Grand Avenue off-ramp was permanently closed, and the newly constructed off-ramp opened on Tuesday, August 26th. Please see the attached construction update provided by SGVCOG. This milestone moves the Project one step closer to a brand-new Grand Avenue bridge and a fully reconfigured on- and off-ramp system designed to enhance mobility, safety, and access for drivers and the local community. The demolition work on the Grand Avenue bridge will begin soon. This work will require overnight closure of Grand Avenue, a full closure of both eastbound and westbound lanes on SR-60, and multiple on- and off-ramp closures on the evening of September 27th. Page 13 of 15 Agenda Item #: 4.2 Meeting Date: September 11, 2025 A Special Presentation, prepared by the SGVCOG staff, has been scheduled for the next City Council meeting on September 16th. PREPARED BY: David G. Liu, Public Works Director/City Engineer, Public Works ATTACHMENTS: 1. SR-57-60 Project - SGVCOG Construction Notice Template Page 14 of 15 Page 15 of 15