The Bosworth/Monterey Connections Quick-Build Project is exploring ways to make is safer and easier for everyone—whether you walk, bike, roll, or drive—to get around near the I-280 freeway and Glen Park BART station. Guided by community feedback and the San Francisco County Transportation Authority’s Northbound I-280 Geneva Avenue Off-Ramp Study,the project seeks to address safety issues and missing links in the transportation network, especially connections between the Hearst, Arlington, and Cayuga Slow Streets. We are focusing on two main routes where changes could make the biggest difference:
- East-west connection – Circular Ave and Monterey Blvd between the Hearst Slow Street and San Jose Avenue
- North-south connection – Bosworth St and Lyell St between Diamond Street and the Cayuga Slow Street
This quick-build project responds to community calls for safer streets, especially near the I-280 ramps. It focuses on targeted steps to make it easier and safer to reach important neighborhood places, like Slow Streets and the Glen Park BART station.
One of our main goals is to make it clearer how everyone should navigate complex streets and intersections—whether you’re driving or bicycling. Community members have raised concerns about confusing right-of-way, such as in the comment below:
“I mainly commute by bike (with a child in tow), and [turning at Bosworth Street & Arlington Street] can feel particularly treacherous with cars flying by in both directions. Can someone please evaluate adding signage/signaling to protect this turn a bit more? Both for cyclists and motorists?”
Key intersections being studied
The Monterey Bosworth Connections Quick-Build Project will focus on improving safety for people on bicycles near the I-280 Monterey on-ramp and other treatments to clarify users’ paths-of-travel. The project will take advantage of existing opportunities to address community requests. The project will also focus on opportunities for improved connections between Glen Park Bart and areas southeast, including Arlington Slow Street.
Monterey Blvd & Circular Ave
The Monterey & Circular intersection is busy and has odd angles. It’s a key point for people driving to and from I-280 and for those biking across town. Eastbound Circular Avenue has a wide, unmarked lane, making it unclear where cars should go. There are no bike lanes, so people on bikes must share the road with cars. The westbound right-turn slip lane encourages fast turns, and many people have reported conflicts between drivers and cyclists at the end of the off-ramp.
Bosworth St & Lyell St
The Bosworth & Lyell intersection is wide and allows for many types of turns, including left turns onto I-280 and Arlington Street. It has no traffic signal—only painted lines to guide drivers. The eastbound right lane on Bosworth Street is often used as a right-turn lane, pushing through traffic and buses into the left lane. There’s no crosswalk where most people want to cross to BART, so many walk mid-block. Drivers entering the freeway have limited visibility and may not yield to pedestrians. People bicycling from Arlington Street (and the nearby Slow Street) have difficulty making left turns onto Bosworth Street.
Project opportunities
As the project team reviews issues, community feedback has already pointed out several ideas for making these streets safer and easier to use.
Circular and Monterey
A protected bikeway along the San Jose Avenue ramp could connect Glen Park BART to the existing protected bikeway further east on San Jose Avenue. Adding new bikeways on Monterey Boulevard and Circular Avenue would fill gaps in the bike network and connect westward to Hearst Slow Street.
Bosworth and Lyell
A new crosswalk and a pedestrian beacon at Bosworth and Arlington would give people walking to BART a direct way to cross. Further south, a raised crosswalk at Cayuga and Lyell would make it easier and safer to cross Cayuga Slow Street and help slow down cars going downhill.
Funding
This project is funded through the SFMTA’s Quick-Build Program, with support from voter-approved Prop L sales tax funds, managed by the SFCTA.
What is a quick-build project?
The Safe Streets Directive is a citywide policy to address traffic collisions in San Francisco. As part of this, the SFMTA’s Quick-Build Program works to quickly install traffic-safety projects.
Quick-build projects focus on making streets safe, especially those with the highest rates of injury, as identified on San Francisco's High-Injury Network. These projects include flexible traffic-safety measures that SFMTA and Public Works crews can install in a matter of months, not years. After installation, the projects are reviewed and adjusted based on what works best for the community.
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
- Preliminary Engineering
