Ramp, Lane Closures on Northbound, Southbound US-101 as Part of Marin Sonoma Narrows B7 Project in Marin County

Schedule: Monday July 6 through Friday July 10 from 8:30 p.m. to 6:30 a.m.

Marin County - Caltrans has scheduled ramp and lane closures for paving on Northbound and Southbound US-101 for the Marin Sonoma Narrows B7 project from Monday, July 6 through Friday, July 10 from 8:30 p.m. until 6:30 a.m. the next mornings.

The San Antonio Road on- and off-ramps are scheduled to be closed on Northbound US-101 during that time period.

Other ramps on Northbound and Southbound US-101 could be closed intermittently as well.

Detour for San Antonio Road on-ramp on Northbound US-101

• Drivers must enter on US-101 southbound at San Antonio Road, exit at the Atherton Avenue off-ramp and then re-enter US-101 northbound.

Detour for San Antonio Road off-ramp closure on Northbound US-101

• Drivers must exit at Petaluma Boulevard South/ Kastania Road, enter US-101 southbound, and exit at San Antonio Road.

This is the last remaining High Occupancy Vehicle (HOV) lane construction project as part of the 16-mile US-101 Marin-Sonoma Narrows (MSN) program.

This three-lane configuration has completed and allows continuous HOV lanes on US-101 from Sausalito in Marin County to Windsor in Sonoma County.

All work is weather dependent.