Fairfax-Bolinas Road in West Marin at milepost 5.73 (approximately 2 miles west of Azalea Hill) is single-lane access with two-way traffic controlled through one lane. This condition is at the construction zone only and will remain in place until project is completed. See project webpage for more details. Thank you for your patience while this project progresses.

Lucas Valley Road MP 9.60 Slip -out Repair



Storms caused a slip out adjacent to the existing retaining wall in front of 7299 Lucas Valley Road. The County proposes to install a new retaining wall along the stretch with a rock buttress to stabilize the site and prevent future erosion.


The engineer’s estimate is $720,000 and will be funded through the Federal Highways Administration’s Emergency Relief Funds with a local match.

Traffic impacts

There will be one lane access with alternating two-way control through the single lane. Traffic delays will be limited to 5 minutes. A temporary traffic signal system will be implemented and operational during non-working hours. Traffic delays can be expected during non-working hours.


Summer 2024

  • Expected construction phase
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