1 Presented By:
CITY COUNCIL MEETING
September 26, 2023
Slauson Corridor
Improvements Project
I-5 to I-710
2 Purpose of
Presentation
Slauson bridge over I-710
Slauson undercrossing at I-5
• Inform City Council on Project
Progress.
• Present proposed Slauson Corridor
Concept Plan
• Seek Council approval on the
preferred corridor concept plan.
3 Corridor
Background
• Regional corridor between I-710 &
I-5
• A key east-west arterial corridor in
the Gateway Cities COG
• Key link in the regional goods
movement to/from POLA, POLB,
UPRR & BNSF Terminals, and
Regional Businesses.
4 Corridor
Background
• 6 Lanes (3 per direction) with
mixture of painted and raised
concrete medians
• Serves as an alt. route to 710 N-S
to/from I-5 E-W
• 9 signalized intersections
5 Corridor
Background
• Existing on-street daytime parking
- Malt to Gage/I-5
• Designated Future Class-II Bike
Lane Facility
• Approximately 21,000 vehicles per
day, including ~20% truck traffic
• Transit Route – 19 existing bus
stops: Metro Local Line 108 & City
of Commerce Yellow/Green/
Orange lines
6 Project
History
• KOA collected traffic data, conducted a
detailed transportation impact study,
developed conceptual design plans and
collaborated with City Staff to identify a
preferred alternative
• Two Outreach meetings conducted to obtain
feedback from local stakeholders who may
be potentially be impacted by on-street
parking removal
7 Goals
1. Increase capacity efficiency of the street, and
reduce congestion along Slauson Avenue.
2. Improve motorist, bicyclist and pedestrian safety.
3. Enhance connectivity between major trip
generators and transportation facilities.
4. Consider new/modified raised medians to improve
driveway access and intersection safety.
5. Enhance bus stops with shelters, benches, trash
cans, and other amenities.
8 Key Project
Features
• Traffic signal upgrades
and signal timing
improvements
• Protected/Separated
On-Street Bike Lanes in
place of existing
curb/parking lanes
• Traffic signage, striping
& roadway marking
improvements, and
pavement rehabilitation
9 Key Project
Features
(cont.’d)
• Raised/landscaped
median modifications
• Bus stop improvements
and amenities
• Street lighting
improvements
10 Summary of
Traffic/
Transportation
Studies
• Level of Service (LOS) Analysis for Signalized
Intersections
• Daily Traffic Roadway Capacity Analysis (ADT)
• Left-turn Delay, Turn Pocket Queuing, and Protected LT Phase Signal Feasibility Analyses
• Truck Turning Analyses
• 5-Year Collision Assessment (Intersections and Midblocks) and Lighting Analysis • On-Street Parking Analysis
• Bus Stop Amenities Survey & Boarding Counts Analysis
11 Summary of
Traffic/Parking
Analysis
Findings
• Existing peak-hour LOS is adequate, except at Garfield and Gage/I-5. Future Year LOS, with the addition of bike lanes by lane reduction, can be mitigated to acceptable LOS with additional signal timing/operational improvements.
• Overall traffic levels during the Horizon Year will degrade, to an extent. However, the corridor’s daily traffic-carrying capacity will maintain acceptable LOS.
• Currently a maximum of 88 cars park at a time on-street between Malt and Gage. Analysis shows that adjacent
properties, cumulatively, have sufficient on-site parking to adequately absorb the existing on-street parking demand. • Traffic collisions occurred most frequently at Eastern, Gage/I-5, Greenwood, and Garfield. Intersection improvements will target minimizing crash risk & severity at these locations. • Highest bus boardings at Eastern, Boxford and Garfield 12 Proposed
Bicycle
Facility
Alternatives
Alternatives Considered Where On-Street
Parking is Affected (Malt to Gage/I-5):
• Alternative 1 – Maintain On-Street
Parking; Bring Bicyclists onto the
Sidewalk and Create a Shared
Pedestrian/Bicycle Pathway
13 Proposed
Bicycle
Facility
Alternatives
(cross-sections)
Alternative 2 – Remove OnStreet Parking Lane; Repurpose the “curb lane” area as a buffered Class
2 (on-street striped) bike lane –
Preferred Option
14 Bike Lane
Buffer -
Alternatives
Considered
Striped Buffer
Preferred Alternative
Vertical Delineator/
Plastic Bollard
Curb Stops (“armadillos”)
Rolled/Median Curb
15 Buffered
Bike Lane
Concept -
Details
4’ 7’
11’
11’ 11’
Recommended
Concept
16 Stakeholder
Outreach and
Results
Two Outreach Meetings:
August 23 (Evening)
• 223 addresses mailed to between Malt
and Gate
• 66 businesses and residents directly
visited and provided with the meeting
flyer
September 14 ( 11:30 am to 1:30 pm)
• 223 addresses sent mailers to
• 80 businesses and residents contacted/recontacted in person with flyers/notices 17 Buffered
Bike Lane
Concept –
Plan View
Bicycle Conflict Zone Markings
at Intersection Approach
Green Bike Lane
Pavement Markings
Striped Bike Lane
Buffer Area
Bicycle Conflict Zone
Markings at Driveways
7’ 4’
11’
11’
12’
11’
11’
4’ 7’
18 Questions and Answers!