Calming Traffic in District 11

Supervisor Safai, with support from the SFMTA and the SFCTA are bolstering our commitment to traffic safety in District 11. The Neighborhood Transportation Improvement Program (NTIP) has designated funds for district-wide traffic calming. The goal of this project is to make residential streets safer and more enjoyable for people of all ages who walk, bike and drive.

Between now and Spring 2019, we will implement over 100 traffic safety measures across District 11. Some of these improvements will include speed humps. Many of these measures were prioritized based on their proximity to parks and schools, community feedback as well as supervisor input.

What are Speed Humps?

Speed humps are used to reduce mid-block vehicular speeding. These devices are relatively inexpensive, easy and fast to construct, and do not require any trade-offs such as parking removal. Most importantly, speed humps are the most effective traffic calming device in reducing vehicular speeds on a residential street. Speed humps are 12 feet long and have a height of 3.25-3.75 inches at their highest point. Typical spacing is 150-250 feet. If constructed and spaced according to specification they help to maintain a constant vehicular speed on a block and can nearly eliminate all instances of egregious speeding on a street (i.e., over 30 mph).

Cast Your Vote

The typical process for legislating speed humps is to ‘ballot’ households on the impacted block to indicate the level of resident support for the proposed device before proceeding to a SFMTA Public Hearing. Ballots will be sent to each household along the block and residents are asked to vote. The proposed traffic calming plan on the block will only proceed if a majority of respondents vote "yes."

Next Steps

If the speed humps are approved via the ballot process, the proposed humps will be discussed at a future SFMTA Engineering Public Hearing, which is required for any new traffic calming construction. For more information or to request traffic calming measures for your street, visit our webpage.

Further Down the Road

These near-term efforts are closely connected to the community planning effort in the Excelsior that is focused on achieving broader neighborhood traffic safety goals. This longer-term project is currently in the public engagement phase and will identify longer-term proposals that address “cut-through” traffic, speeding and generally improve neighborhood streets for local residents and visitors. A follow-up community event is expected this coming January. You can find more information and sign up for project updates here.

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