HomeMy WebLinkAboutT&T Commission Agenda Packer - 9-12-24
TRAFFIC & TRANSPORTATION
COMMISSION
AGENDA
September 12, 2024
6:30 P.M.
Diamond Bar City Hall
Windmill Community Room
21810 Copley Drive, Diamond Bar, CA 91765
Telephonically: +1 (213) 929-4212 – Access Code: 368-827-355
https://attendee.gotowebinar.com/register/8758527549657146204
Chair Romulo Morales
Vice-Chair Raphael Plunkett
Commissioner Gary Busteed
Commissioner Surendra Mehta
Commissioner Manisha Sulakhe
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, September 12, 2024
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, Mehta, Sulakhe, Vice
Chair Plunkett, Chair Morales
I. APPROVAL OF MINUTES:
A. T&T Commission Meeting Minutes of May 9, 2024
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 April, May, June & July 2023 & 2024
Recommended Action: Receive and File
B. Updates on Various Project/Programs
Recommended Action: Receive and File
IV. STATUS OF PREVIOUS ACTION ITEMS
V. ITEMS FROM COMMISSIONERS:
SEPTEMBER 12, 2024 PAGE 2 TRAFFIC AND TRANSPORTATION COMMISSION
VI. SCHEDULE OF FUTURE CITY EVENTS:
A. CITY COUNCIL MEETING – Tuesday, September 17, 2024 – 6:30 p.m.,
AQMD/Government Center, Auditorium, 21865 Copley Drive
B. PLANNING COMMISSION MEETING – Tuesday, September 24, 2024 – 6:30
p.m., Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive
C. PARKS AND RECREATION COMMISSION MEETING – Thursday, September
26, 2024 – 6:30 p.m., Diamond Bar City Hall Windmill Community Room, 21810
Copley Drive
D. CITY COUNCIL MEETING – Tuesday, October 1, 2024 – 6:30 p.m.,
AQMD/Government Center, Auditorium, 21865 Copley Drive
E. PLANNING COMMISSION MEETING – Tuesday, October 8, 2024 – 6:30 p.m.,
Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive
F. STATE OF THE CITY – Wednesday, October 9, 2024 – 5:30 p.m. – 7:30 p.m.,
Diamond Bar Center, 1600 Grand Avenue
G. DIAMOND BAR RESTAURANT WEEK – Saturday, October 14, 2024 – Friday,
October 20, 2024 (List of Restaurants will be provided when available.)
H. CITY COUNCIL MEETING – Tuesday, October 15, 2024 – 6:30 p.m.,
AQMD/Government Center, Auditorium, 21865 Copley Drive
I. PLANNING COMMISSION MEETING – Tuesday, October 22, 2024 – 6:30 p.m.,
Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive
J. HALLOWEEN PARTY – Saturday, October 26, 2024 – 9:00 a.m. – 12:00 p.m.,
Pantera Park, 738 Pantera Drive
K. CITY COUNCIL MEETING – Tuesday, November 5, 2024 – 6:30 p.m.,
AQMD/Government Center, Auditorium, 21865 Copley Drive
L. VETERANS’ DAY CELEBRATION – Thursday, November 7, 2024 – 9:00 a.m. –
11:00 a.m., Diamond Bar Center, 1600 Grand Avenue
M. PLANNING COMMISSION MEETING – Tuesday, November 12, 2024 – 6:30
p.m., Diamond Bar City Hall Windmill Community Room, 21810 Copley Drive
N. SENIOR HEALTH DAY – Wednesday, November 13, 2024 – 10:00 a.m. – 1:00
p.m., Diamond Bar Center, 1600 Grand Avenue
SEPTEMBER 12, 2024 PAGE 3 TRAFFIC AND TRANSPORTATION COMMISSION
O. TRAFFIC & TRANSPORTATION COMMISSION MEETING – Thursday,
November 14, 2024 – 6:30 p.m., Diamond Bar City Hall Windmill Community
Room, 21810 Copley Drive
VII. ADJOURNMENT
TRAFFIC & TRANSPORTATION COMMISSION
AGENDA REPORT
AGENDA ITEM NUMBER:
1.A
MEETING DATE:
September 12, 2024
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 May 9, 2024
RECOMMENDATION: Receive and File
Attached, for your review and approval, are the T&T Commission Meeting minutes of
May 9, 2014.
Attachments:
1. T&T Commission Meeting MInutes - 5-9-24
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 MEETING
DIAMOND BAR CITY HALL WINDMILL ROOM
21810 COPLEY DRIVE, DIAMOND BAR, CA 91765
MAY 9, 2024
CALL TO ORDER:
Chair Morales called the meeting to order at 6:42 p.m.
PLEDGE OF ALLEGIANCE: Chair Morales led the Pledge of Allegiance
ROLL CALL: Commissioners Gary Busteed, Surendra Mehta,
Manisha Sulakhe, Vice Chair Raphael Plunkett,
Chair Romulo Morales
ABSENT: Commissioners Mehta, Sulakhe
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
I. APPROVAL OF MINUTES:
A. Traffic and Transportation Commission Regular Meeting Minutes of March 14,
2024
VC/Plunkett moved, C/Busteed seconded, to approve the Regular Meeting
Minutes of March 14, 2024. Motion carried by the following Roll Call vote:
AYES: COMMISSIONERS: Busteed, Vice- Chair/Plunkett, Chair
Morales
ABSENT: COMMISSIONERS: Mehta, Sulakhe
ABSTAIN: COMMISSIONERS: None
1.A.a
Packet Pg. 7 Attachment: T&T Commission Meeting MInutes - 5-9-24 (T&T Commission Meeting Minutes of May 9, 2024)
MAY 9, 2024 PAGE 2 T&T COMMISSION
II. PUBLIC COMMENTS: None
Iii. ITEMS FROM STAFF:
A. TRAFFIC STATISTICS – FEBRUARY & MARCH 2024
C/Busteed moved, VC/Plunkett seconded, to receive and file the February and
March 2024 Traffic Statistics Report. Motion carried by the following Roll Call
vote:
AYES: COMMISSIONERS: Busteed, Vice-Chair/Plunkett, Chair
Morales
ABSENT: COMMISSIONERS: Mehta, Sulakhe
ABSTAIN: COMMISSIONERS: None
B. MONTHLY UPDATES OF VARIOUS PROJECTS/PROGRAMS:
1. FY2024-25 Capital Improvement Program Budget – PWD/Liu reported.
The Public Works Department has prepared the FY2024 -25 Capital Improvement Program
(CIP) for the City Council’s consideration at their May 7, 2024 meeting. The proposed list of
projects includes the construction and design phases for several street rehabilitations, park
improvements, and other enhancements to existing public facilities and infrastructure. The
proposed FY2024-25 CIP Budget is $30.25 million, of which $14.25M is for new projects and
$16M is carryover funds from ongoing projects.
2. Residential & Collector Streets Rehabilitation (Areas 3) and Arterial
Street Rehabilitation Design Project – AE/Malpica reported.
The Area 3 pavement rehabilitation project has now entered the construction phase, marking
a significant milestone in its progression. After the successful completion of design work
earlier this fiscal year, the project underwent a rigorous bidding process, ultimately awarding
the contract to the lowest responsible bidder at a value of $9.3 million. In our commitment to
transparency and community engagement, all affected residents and businesses were
promptly notified of the upcoming construction activities during the week of April 15, 2024,
through comprehensive notification letters.
Additionally, message boards have been strategically deployed along the arterials scheduled
to receive asphalt concrete (AC) treatment, ensuring motorists are informed of potential
delays and enabling smoother traffic management. This is a 95- working days project, with
construction scheduled for completion by September 2024.
1.A.a
Packet Pg. 8 Attachment: T&T Commission Meeting MInutes - 5-9-24 (T&T Commission Meeting Minutes of May 9, 2024)
MAY 9, 2024 PAGE 3 T&T COMMISSION
3. Area 4 CDBG Curb Ramp Improvement Project – AE/Malpica reported.
The project is currently in the bidding phase, with an engineering estimate of $80,000. Its
objective is to enhance approximately six (6) curb ramps, ensuring ADA compliance on
existing sidewalks at various locations where either no curb ramps or substandard ones
currently exist. If the bid numbers are favorable, alternate curb ramps will be added.
Construction is tentatively scheduled to commence between May and June 2024, with
completion expected before the end of the fiscal year 2024
4. Grand Avenue and Golden Springs Drive Intersection Improvements –
AE/Malpica reported
The City of Industry contractor has made significant progress in addressing the majority of
outstanding punch-list items required by the City of Diamond Bar. Our staff is actively
collaborating with the City of Industry to bring the project to its final closure. However, due to
some remaining unsatisfactory work as expressed by the City of Industry, we now anticipate
project completion by the end of May 2024.
5. Highway Safety Improvement Program Grant Project -– PWM/Ghafari reported.
The draft design is currently undergoing review by our staff, with plans for project advertising
scheduled for the month of May. We aim to secure a contract before the end of this fiscal
year, with construction slated to begin in July 2024. This funding will facilitate several
enhancements, including the installation of nearside supplemental traffic signal heads,
pedestrian countdown units with Accessible Pedestrian Signal (APS) features, and the re -
striping of high visibility crosswalks at nine (9) critical intersections.
6. SR-57/60 Confluence Improvements Project – PWM/Ghafari reported.
Public feedback and comments were received at the Town Hall meeting hosted by the San
Gabriel Valley Council of Governments (SGVCOG) on March 18th. SGVCOG and City staff
are diligently following up on the initial comments expressed during the meeting. The goal is
to keep the public informed about the project's progress, including any traffic delays and
closures.
Construction of the SR-60 off-ramp at Grand Avenue and sewer work along Golden Springs
Drive between Copley Drive and Gateway Center is continuing despite unforeseeable field
conditions encountered by the contractor, leading to an extension of the original schedule.
Staff are actively collaborating with the contractor and inspectors to minimize traffic impacts
and are coordinating with the City's Public Information team to ensure the public remains
informed.
7. Hawkwood Road Neighborhood Traffic Management Program (NTMP) –
AE/Malpica reported.
Plans were advertised during mid-April with three proposals received. The apparent lowest
bidder is SITEREP Construction with the bidding amount of $35,413.00. Staff is working on
1.A.a
Packet Pg. 9 Attachment: T&T Commission Meeting MInutes - 5-9-24 (T&T Commission Meeting Minutes of May 9, 2024)
MAY 9, 2024 PAGE 4 T&T COMMISSION
the contract agreement this week and the tentative schedule to start the installation of the
speed cushions is early June.
The scope of work includes three (3) strategically located speed cushions along Hawkwood
Road between Bent Wing Lane and Falcon Ridge Road. Additionally, signage, a double
yellow centerline, and edge line striping have been proposed for this stretch of Hawkwood
Road.
8. Upcoming Utility Construction Projects – MA/Delgado reported.
Staff approved plans and issued encroachment permits for several utility improvement
projects that have already started or are anticipated to start construction in the coming
weeks:
• MCI Metro Access Transmission Services – Brea Canyon Road, from Cool Springs
Drive to Cold Spring Lane
o Telecommunications Cable Undergrounding Project
• Southern California Edison – Brea Canyon Road, from Cool Springs Drive to Cold
Spring Lane
o Rule 20A Utility Undergrounding Project
Public Works staff is committed to ensuring that all construction impacts are properly
mitigated to limit the effect on our community. The City's Public Works Inspector monitors all
active utility construction projects to ensure that work is completed per the approved plans
and permit conditions.
Following staff's reports and responses to Commissioners' questions and concerns,
VC/Plunkett moved, C/Busteed seconded, to receive and file the Updates on Various
Projects and Programs. Motion carried by the following Roll Call vote:
AYES: COMMISSIONERS: Busteed, Vice-Chair/Plunkett, Chair
Morales
ABSENT: COMMISSIONERS: Mehta, Sulakhe,
NOES: COMMISSIONERS: None
IV. STATUS OF PREVIOUS ACTION ITEMS:
None
1.A.a
Packet Pg. 10 Attachment: T&T Commission Meeting MInutes - 5-9-24 (T&T Commission Meeting Minutes of May 9, 2024)
MAY 9, 2024 PAGE 5 T&T COMMISSION
V. ITEMS FROM COMMISSIONERS:
None
VI. SCHEDULE OF FUTURE CITY EVENTS:
As presented in the Agenda.
VII. ADJOURNMENT: There being no further business to come before the Traffic and
Transportation Commission, Chair/Morales adjourned the meeting at 7:55 p.m. to
Thursday, July 11, 2024, at 6:30 p.m.
The foregoing minutes are hereby approved this day of , 2024.
Respectfully Submitted,
______________________________
David G. Liu, Secretary
Attest:
___________________________________________
Chair Romulo Morales
1.A.a
Packet Pg. 11 Attachment: T&T Commission Meeting MInutes - 5-9-24 (T&T Commission Meeting Minutes of May 9, 2024)
TRAFFIC & TRANSPORTATION COMMISSION
AGENDA REPORT
AGENDA ITEM NUMBER:
3.A
MEETING DATE:
September 12, 2024
TO:
Chair and Members of the Traffic and Transportation
Commission
FROM: David G. Liu, Public Works Director/City Engineer
SUBJECT: Traffic Statistics for April, May, June & July 2023 &
2024
RECOMMENDATION: Receive and File
Attached, for your review, are the Traffic Statistic Reports for the months of April, May,
June and July 2024 as submitted by the L.A. County Sheriff’s Department. Also
included are the Traffic Statistics for the previous year, 2023, for comparison.
Attachments:
1. Traffic Statistics - April & May 2023
2. Traffic Statistics - April & May 2024
3. Traffic Statistics - June & July 2023
4. Traffic Statistics - June & July 2024
CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117
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CITY OF DIAMOND BAR
TRAFFIC STATISTICS
APRIL & MAY 2023
Prepared by:
PUBLIC WORKS DEPARTMENT
Data Provided by:
LOS ANGELES COUNTY SHERIFF’S DEPARTMENT
WALNUT/DIAMOND BAR SHERIFF’S STATION
Report Completed:
SEPTEMBER 2023
3.A.a
Packet Pg. 13 Attachment: Traffic Statistics - April & May 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITATIONS
8
81
89
11
89
100
Apr-23 May-23
Non-Haz Hazard Total
3.A.a
Packet Pg. 14 Attachment: Traffic Statistics - April & May 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
COLLISIONS
5
10
22
27 27
37
Apr-23 May-23
INJURY NON INJ TOTAL
APRIL 2023
D.U.I ARREST= 6 D.U.I. COLLISIONS= 2
MAY 2023
D.U.I ARREST= 2 D.U.I. COLLISIONS= 0
3.A.a
Packet Pg. 15 Attachment: Traffic Statistics - April & May 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
STREET SWEEPING
232
243
Apr-23 May-23
3.A.a
Packet Pg. 16 Attachment: Traffic Statistics - April & May 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITY OF DIAMOND BAR
TRAFFIC STATISTICS
APRIL & MAY 2024
Prepared by:
PUBLIC WORKS DEPARTMENT
Data Provided by:
LOS ANGELES COUNTY SHERIFF’S DEPARTMENT
WALNUT/DIAMOND BAR SHERIFF’S STATION
Report Completed:
SEPTEMBER 2024
3.A.b
Packet Pg. 17 Attachment: Traffic Statistics - April & May 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITATIONS
27
87
114
14
62
76
Apr-24 May-24
Non-Haz Hazard Total
3.A.b
Packet Pg. 18 Attachment: Traffic Statistics - April & May 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
COLLISIONS
15
9
29
24
44
33
Apr-24 May-24
INJURY NON INJ TOTAL
APRIL 2024
D.U.I ARREST= 0 D.U.I. COLLISIONS= 0
MAY 2024
D.U.I ARREST= 2 D.U.I. COLLISIONS= 0
*Total Injury Collisions includes one fatality in the month of May 2024
3.A.b
Packet Pg. 19 Attachment: Traffic Statistics - April & May 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
STREET SWEEPING
272
252
Apr-24 May-24
3.A.b
Packet Pg. 20 Attachment: Traffic Statistics - April & May 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITY OF DIAMOND BAR
TRAFFIC STATISTICS
JUNE & JULY 2023
Prepared by:
PUBLIC WORKS DEPARTMENT
Data Provided by:
LOS ANGELES COUNTY SHERIFF’S DEPARTMENT
WALNUT/DIAMOND BAR SHERIFF’S STATION
Report Completed:
SEPTEMBER 2023
3.A.c
Packet Pg. 21 Attachment: Traffic Statistics - June & July 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITATIONS
12
93
105
7
51
58
Jun-23 Jul-23
Non-Haz Hazard Total
3.A.c
Packet Pg. 22 Attachment: Traffic Statistics - June & July 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
COLLISIONS
1212
17
24
29
36
Jun-23 Jul-23
INJURY NON INJ TOTAL
JUNE 2023
D.U.I ARREST= 3 D.U.I. COLLISIONS= 2
JULY 2023
D.U.I ARREST= 2 D.U.I. COLLISIONS= 0
3.A.c
Packet Pg. 23 Attachment: Traffic Statistics - June & July 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
STREET SWEEPING
270
184
Jun-23 Jul-23
3.A.c
Packet Pg. 24 Attachment: Traffic Statistics - June & July 2023 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITY OF DIAMOND BAR
TRAFFIC STATISTICS
JUNE & JULY 2024
Prepared by:
PUBLIC WORKS DEPARTMENT
Data Provided by:
LOS ANGELES COUNTY SHERIFF’S DEPARTMENT
WALNUT/DIAMOND BAR SHERIFF’S STATION
Report Completed:
SEPTEMBER 2024
3.A.d
Packet Pg. 25 Attachment: Traffic Statistics - June & July 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
CITATIONS
25
60
85
18
45
63
Jun-24 Jul-24
Non-Haz Hazard Total
3.A.d
Packet Pg. 26 Attachment: Traffic Statistics - June & July 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
COLLISIONS
4
13 14
29
18
42
Jun-24 Jul-24
INJURY NON INJ TOTAL
JUNE 2024
D.U.I ARREST= 3 D.U.I. COLLISIONS= 1
JULY 2024
D.U.I ARREST= 3 D.U.I. COLLISIONS= 1
3.A.d
Packet Pg. 27 Attachment: Traffic Statistics - June & July 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
STREET SWEEPING
152
240
Jun-24 Jul-24
3.A.d
Packet Pg. 28 Attachment: Traffic Statistics - June & July 2024 (Traffic Statistics for April, May, June & July 2023 & 2024)
TRAFFIC & TRANSPORTATION COMMISSION
AGENDA REPORT
AGENDA ITEM NUMBER:
3.B
MEETING DATE:
September 12, 2024
TO:
Chair and Members of the Traffic and Transportation
Commission
FROM: David G. Liu, Public Works Director/City Engineer
SUBJECT: Updates on Various Project/Programs
RECOMMENDATION: Receive and File
A. Residential & Collector Streets Rehabilitation (Areas 3) and Arterial
Street Rehabilitation Design Project
The Area 3 Pavement Rehabilitation Project is nearing completion. The Project is
currently in the final phases, which include final striping, loop installation, and manhole
adjustments. A final punch list is also underway to ensure that all aspects of the project
meet our quality standards. Full completion is expected before the end of September
2024.
B. Area 4 CDBG Curb Ramp Improvement Project
The Public Works Department has completed the demolition and reconstruction of four
(4) existing curb ramps within Maintenance Area 4 in August 2024. The new curb ramps
help ensure ADA compliance on existing sidewalks at various locations where either no
curb ramps or substandard ones existed prior to these improvements.
Diamond Bar’s elevated topography adversely influences costs for accessibility upgrade
projects, since it is often difficult to meet the maximum grade thresholds for the new
walkways without avoiding extensive demolition work and also retaining slopes.
CITY OF DIAMOND BAR ~ 21810 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7040 ~ FAX (909) 861-3117
3.B
Packet Pg. 29
The construction phase of this project was entirely funded by the Community
Development Block Grant (CDBG).
C. Grand Avenue and Golden Springs Drive Intersection Improvements
The City of Industry has yet to file the Notice of Completion. Public Works continues to
collaborate with the City of Industry to bring the project to its final closure. However, as
expressed by the City of Industry, the project’s final closure is anticipated to be
completed by the end of October 2024 due to some punch list work items.
D. Highway Safety Improvement Program Grant Project
Following the approval of the construction plans and specifications, the project was
advertised for bids on PlanetBids on May 14, 2024. Staff successfully secured a
contract with PTM General Engineering Services, Inc. for $251,355. A Notice to
Proceed has not yet been issued due to material lead times. This project, which is
expected to take 30 working days, will include several enhancements, i.e., the
installation of nearside supplemental traffic signal heads, pedestrian countdown units
with Accessible Pedestrian Signal (APS) features, and the re-striping of high-visibility
crosswalks at nine critical intersections.
E. SR-57/60 Confluence Improvements Project
Construction for the SR 57/60 Interchange Improvements continues. Contractor is
currently working on construction of bridge foundations and substructures, storm drain
relocations, retaining walls along northbound SR 57 and eastbound SR 60, sanitary
sewer relocations along Golden Springs Drive, and utility relocations along Grand
Avenue.
Stage 1b traffic control was implemented during the night of September 5, 2024. The
new change involved significant modifications to traffic patterns for both westbound and
eastbound traffic on Golden Springs Drive between Copley Drive and Gateway Center.
The detour through Copley Drive will be removed and intermittently adjusted and
implemented as necessary.
Key Changes:
• Full Closure: On the night of September 5th, Golden Springs Drive was closed
to vehicular access between Lavender Drive and Adel Avenue to prepare for new
traffic control measures and striping.
• Westbound Traffic: The westbound lanes will shift from a double-lane
configuration starting west of Ayers Hotel to a single-lane configuration,
transitioning at the intersection of Golden Springs Drive and Gateway Center.
Beyond the SR-57 freeway bridge, the lanes will return to a double -lane
configuration.
3.B
Packet Pg. 30
• Eastbound Traffic: To accommodate the westbound traffic flow, the eastbound
lanes will be reduced from a double-lane to a single-lane configuration before the
SR-57 freeway bridge, extending to the intersection at Golden Springs Drive and
Gateway Center. Beyond the intersection, the lanes will return to a double -lane
configuration.
• Westbound Full Closure: The westbound lanes on Golden Springs Drive, west
of Gateway Center, will be fully closed to facilitate the construction of the freeway
bridge extension.
These adjustments are necessary to ensure the safety of the construction crew, drivers,
and the public in general during the bridge extension work, as planned. The new traffic
control measures will be in place for over a year. Please find attached an exhibit
depicting the Stage 1b traffic control implementation.
Staff are actively collaborating with the contractor and inspectors to minimize traffic
impacts and are coordinating with the City's Public Information team to ensure the
public remains informed.
F. Hawkwood Road Neighborhood Traffic Management Program (NTMP)
The Public Works Department completed the construction of three (3) sets of speed
cushions and associated signage and striping per the approved plans along Hawkwood
Road, between Bent Twig Lane and Falcon Ridge Road, in June 2024.
The work was the second phase of a two-phase NTMP. The first Hawkwood Road
NTMP phase was completed in 2023, but after the monitoring period, staff decided to
proceed with this program's second phase.
Staff will continue to monitor the effectiveness of these traffic calming devices, and
collect new speed data along Hawkwood Road to compare the post -construction
conditions to reference with prior studies.
G. Upcoming Utility Construction Projects
Staff approved plans and issued encroachment permits for several utility improvement
projects that have already started or are anticipated to start construction in the coming
weeks:
• Southern California Edison – Citywide
o Option E – LED Streetlight Conversion Project
• Southern California Edison – Brea Canyon Road, from Cool Springs Drive to
Cold Spring Lane
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o Rule 20A Utility Undergrounding Project
Public Works staff is committed to ensuring that all construction impacts are properly
mitigated to limit the effect on our community. The City's Public Works Inspector
monitors all active utility construction projects to ensure that work is completed per the
approved plans and permit conditions.
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