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Clipper Street Traffic Calming Project

This project was made possible in part by the San Francisco County Transportation Authority through a grant of Proposition K Local Sales Tax Funds.

Project Information

Various concerns have been expressed regarding traffic conditions along Clipper Street between Diamond Heights Boulevard and Douglass Street. They include:
· Speeding,
· Difficulty crossing street to/from parking on southside of street,
· Near rearend crashes between people accessing driveways and downhill drivers,
· Safer access to Douglass Park on the southeast portion of the project area, and
· Lack of walking space along south side of street where parking is allowed.

This section of Clipper Street is 64’ wide and a designated bicycle route, has 4 lanes of traffic (2 each way), parking on both sides of the street east of Grand View, Muni service west of Grand View, no sidewalk on the south side of the street, and a designated speed limit of 35 mph.

Speeding – Data has been collected confirming concerns about speeding.
Volumes – Traffic volumes on this section, ~12,000 vehicles/day, do not require 4 lanes of traffic and can be handled by 2 lanes of traffic, one in each direction.
Grant History – the SFMTA applied for three grants requesting funds to improve Clipper Street since the traffic calming application was received in December 2004. The third grant application was awarded and allows for restriping of the street to slow speeds, improve access to driveways, ease crossing of the street, and create more space for pedestrians and bicyclists.

Project Update

Clipper Street was re-striped in early 2008 to have one lane in each direction and a center turn lane for access to and from the residential driveways. Residents report lower speeds and noise levels thus far. A temporary island was also demarcated in the turn lane to discourage illegal passing in the turn lane. Funding for a permanent island or two in the turn lane is being sought. When the injunction against the city’s Bicycle Plan is lifted, bike lanes will also be added in both directions.

Traffic Calming Overview

Please review our section on the general principles of Traffic Calming on this website to get an idea of what this program is about.

Future Meeting Notices

The Clipper Street Traffic Calming Project Kick-Off Meeting was a success. Thank you all for attending.

Meeting Minutes

Fact Sheet for Clipper Street Community Meeting held on April 24, 2007
Minutes from the Clipper Street Traffic Calming Project Kick-Off Meeting (April 24, 2007)

Project Area Map

Project area is Clipper Street between Diamond Heights Boulevard and Douglass Avenue.

Clipper St Project Limits

Miscellaneous

Kick-off Meeting Flyer

Draft Traffic Calming Plan Option for Clipper Street between Diamond Heights Blvd and Douglass Avenue:
Page 1 (west end)
Page 2 (east end)

Feedback

By Phone - Livable Streets Hotline: 415-554-2398

By FAX - Livable Streets FAXline: 415-701-4343

By E-Mail - Livable Streets Mailbox: sustainable.streets@sfmta.com

By US Mail:
Mike Sallaberry, SFMTA Transportation Engineer
City and County of San Francisco - Municipal Transportation Agency
Transportation Planning and Development Division - Traffic Calming Program
1 South Van Ness Avenue - 7th Floor
San Francisco, CA 94103

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