California Department of Transportation

10/02/2025 | Press release | Distributed by Public on 10/03/2025 12:15

Ramp, Lane Closures for Westbound, Eastbound SR-37 Capital Preventive Maintenance Project in Marin County

Ramp, Lane Closures for Westbound, Eastbound SR-37 Capital Preventive Maintenance Project in Marin County

Published: Oct 02, 2025

Schedule: Work is for the week of Monday, Oct. 6

Marin County - Caltrans will continue its Capital Preventive Maintenance project in October on Westbound and Eastbound State Route 37 (SR-37) in between Atherton Avenue and the Petaluma River Bridge in Novato for guard rail work.

The on-ramp from Harbor Drive onto Eastbound SR-37 will be closed Monday, Oct. 6 between 5 a.m. and 10 a.m. for guardrail repair.

Detour for Harbor ramp
Traffic should head west on Harbor Drive to Atherton Avenue and enter Westbound SR-37.
Drive to the next exit (Hanna Ranch Road), exit the freeway, and use the access to enter Eastbound SR-37 from that location.

Lane closures on Eastbound and Westbound SR-37 will continue from Monday, Oct. 6 through Friday, Oct. 10.

One lane is scheduled to be closed on Eastbound SR-37 from between 4 a.m. and 1 p.m. each day.

One lane is scheduled to be closed on Westbound SR-37 from between 9 a.m. and 5 p.m. each day.

Also, there is night work scheduled for road stabilization on Eastbound SR-37 between Novato Creek and Atherton Avenue from during that same time frame from 8 p.m. to 6 a.m. the next mornings.

All construction Is weather dependent.

This capital maintenance pavement rehabilitation project involves paving and median barrier work in Novato. The project will grind and re-pave the roadway between the Ignacio overhead to the Petaluma River Bridge - a stretch of about three miles.

Please drive with caution. Slow for the Cone Zone and Be Work Zone Alert. Caltrans thanks motorists for their patience while we work to maintain our state's highways, bridges, and tunnels.

For real-time traffic, click on CaltransQuickMap: https://http://quickmap.dot.ca.gov/ For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay

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California Department of Transportation published this content on October 02, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 03, 2025 at 18:15 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]