The Bosworth/Monterey Connections project aims to connect crosstown bike routes and Slow Streets to improve safety on San Francisco’s active-transportation network, while addressing multimodal safety at key intersections. The project will make key safety changes near I-280 freeway ramps informed by SFCTA’s ongoing I-280 Northbound Geneva Avenue Off-Ramp Study and in response to community requests. The project will connect the Hearst, Arlington, and Cayuga Slow Streets by filling in gaps between existing bikeways and will be organized into two key areas:
- East-west connection – Circular Ave and Monterey Blvd
- North-south connection – Bosworth St and Lyell St
The Bosworth/Monterey Connections Quick-Build Project responds to years of requests to improve the traffic safety in the neighborhood, particularly near the I-280 freeway ramps. It will focus on targeted measures to respond to community concerns and better connect existing high-quality active-transportation routes, such as the Hearst, Arlington, and Cayuga Slow Streets, as well as the K-rail-protected bikeway on San Jose Avenue, steering people bicycling and rolling around the busy Bosworth and Diamond intersection and freeway.
Project Elements
Circular Ave and Monterey Blvd (between the Hearst Slow Street and San Jose Avenue) includes treatments that respond directly to 311 requests that increase safety for people on bicycles near the I-280 entrance and other treatments to better organize users’ paths-of-travel.
- Possible westbound traffic diverter at Hearst Ave
- Eastbound separated bikeway on Circular Ave with bicycle pocket lane and right turn onto I-280 freeway
- Median island modification at Joost St to allow for bicycle left turns
- Possible signal modification at Circular Ave to allow for bicycle left turns onto Diamond St and the Glen Park BART station
- Possible westbound bikeway on Monterey Blvd between Diamond St and Circular Ave
West of Diamond St, a new connection will link the Glen Park BART station with the Arlington Slow Street and existing protected bikeway on San Jose Avenue.
- Two-way protected bikeway with K-rail between Diamond St and Arlington St
- Upgraded westbound bikeway on San Jose Ave’s off-ramp to Arlington St
- Bikeway crossover change at westbound San Jose Ave & Rousseau St
- Traffic calming on the Arlington Slow Street
Bosworth St and Lyell St include treatments that connect to area southeast of the Glen Park BART station, including to the Cayuga Slow Street.
- Possible rectangular rapid flashing beacon (RRFB) at I-280 freeway on-ramp on Bosworth St
- Modified southbound bikeway with buffer on Lyell St
- Intersection modifications for bike and vehicle safety
What is a quick-build project?
Quick-build projects are part of an established program that focuses on implementing safety improvements on streets identified on San Francisco's Vision Zero High-Injury Network.They include adjustable and reversible traffic safety improvements that SFMTA crews can install quickly. Unlike major capital projects that may take years to plan, design, bid, and construct, quick-build projects are buildable within weeks and months. They are intended to be evaluated and reviewed after implementation to inform adjustments and lessons for future projects.
Typical quick-build type improvements include:
- Roadway paint, traffic delineators, and street signs
- Parking and loading (curb management) adjustments
- Traffic signal timing changes and small hardware modifications
- Planning