California Department of Transportation

04/30/2026 | Press release | Distributed by Public on 05/01/2026 11:34

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

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

Published: Apr 30, 2026

Schedule: Monday, May 4 through Friday May from 3 a.m. to 11 a.m.

Marin County - Caltrans has scheduled closing the Southbound US-101 to Eastbound State Route 37 (SR-37) connector ramp and the Eastbound SR-37 to Marsh Drive off-ramp as part of the SR-37 Capital Preventive Maintenance Project in Novato.

Closures are from Monday, May 4 through Friday, May 8 from 3 a.m. to 11 a.m. each day for curb demolition and installation.

Southbound US-101 to Eastbound SR-37 detour

Drivers should continue Southbound on US-101, take the Bel Marin Keys Boulevard exit and then re-enter Northbound US-101 to reach Eastbound SR-37.

Marsh Drive off-ramp closure from Eastbound SR-37

Drivers should proceed to Atherton Avenue and turn back onto Westbound SR-37 to reach the Marsh Drive/Hanna Ranch Road exit.

Changeable Message Signs (CMS) will be active to alert drivers about the closures.

All construction Is weather dependent.

This capital maintenance pavement rehabilitation project involves paving and median barrier work in Novato. The project grinded and re-paved 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: 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 April 30, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on May 01, 2026 at 17:34 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 If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]