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BUtterfield Safety


The Butterfield Corridor Safety Committee, a subcommittee of Butterfield Corridor Safe Streets, has been hard at work over the past year identifying the community’s long-standing concerns and coming up with improvements to address them. This collaborative group includes representatives from the Sleepy Hollow Homes Association, the County of Marin Department of Public Works, the Town of San Anselmo Public Works, local schools, Safe Routes, the Marin County Bicycle Coalition and interested residents. 

In the last year, a partial bike lane was implemented/striped and signs were installed.  This change extended the bike lane from  Butterfield Road, City of San Anselmo, to Sleepy Hollow Drive. Travelers on Butterfield have noted what a difference this makes, the lack of parked cars in bike lanes is notable allowing safer passage in our corridor. 

There is a survey in progress that is collecting opinions on both Butterfield and Green Valley Court (GVC) (for those who select that they utilize GVC for school or personal).  The survey results will be directional regarding how the current safety of Butterfield is perceived and if there is a consensus of support to extend the bike lane to the north end of Butterfield.  In addition, it is reviewing the congestion on Butterfield and Green Valley Court, impact on residents and the safety of the students who utilize this route.

We are thrilled to announce that the county has approved a cross walk from Irving to the community center!  This win for a community is a result of consensus and public support. The crosswalk will be ADA compliant and will require a new curb on the southside of Irving and Butterfield.  The design is in progress but will allow for an island refuge and safer crossing in this high foot traffic and road traffic area.  It will also have a rapid flashing beacon for additional safety.  Estimated time for installation will be summer of 2024. There has been extensive conversations around roundabouts and traffic slowing measures.  At this time, the arterial status of Butterfield limits these solutions but we continue to explore options for the safety of our community and those who utilize these routes. A great way to share your views is to complete the survey, please click on

Road safety is a shared responsibility; bikers, scooters, strollers, and drivers all play a vital role by being attentive, using designated crossings, and staying visible to ensure safe journeys for everyone.

Please exercise caution regarding vehicle speed, wear helmets, and follow the rules of the road for the safety of all. 

Please click here for an FAQ about the two current projects (bike lane on Butterfield and Community Center crossing) as well as more information about the committee and other safety concerns.

You can read past SHHA bulletin articles as well which cover the team's work.


April 2022

To Butterfield Corridor Residents, Neighbors and All Users,

WE HEARD YOU! Thanks to all of you (almost 900 strong!) that filled out the recent Butterfield Safety Survey! The response was tremendous and demonstrates how many people use the Butterfield corridor and how much safety is a concern for people walking and biking. The Butterfield Safety Committee is working to improve the safety of the corridor for everyone, in particular vulnerable users (young people and older adults) and those traveling by active modes (walking, scooting, biking, etc.) and your responses go a long way to help inform our work.

Please see the infographic that breaks down the survey responses into areas such as who responded, survey findings, support for changes and importantly, and conclusions drawn from results. Highlights: few people walking and biking are always comfortable on Butterfield, there’s a large number of unreported bike crashes (most involving children), and there is broad support for a designated bike/walk lane in the unincorporated section of Butterfield.

To that end, we hope you will join us for a Community Meeting on April 21 from 6 to 7pm (via zoom) to review the survey, review/discuss concepts for crosswalk at community center and designating the shoulder (in unincorporated Marin) a true bike/walk lane. We will discuss potential issues and solutions arising from these concepts in the entire corridor. If you have questions or comments, please email beforehand to make sure we cover/discuss in the meeting. We want to hear from you as a user of the Butterfield corridor!

Thank you for being involved in improving the safety of the Butterfield Road!

-Butterfield Safety Committee

A collaboration of Sleepy Hollow Homes Association, the Marin County Department of Public Works, San Anselmo Department of Public Works, Marin County Bicycle Coalition, Safe Routes, local schools and concerned residents


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