Lane, Ramp Closures Scheduled Nightly on US-101 for Capital Preventive Maintenance Project in Marin County

Schedule: Monday, Sept. 14 through the morning of Saturday, Sept. 19

Marin County - Caltrans is scheduled to continue its Capital Preventive Maintenance project along US-101 in September.

Various southbound lanes will be closed on Southbound US-101 from Monday, Sept. 14 through the morning of Saturday, Sept. 19 from 8 p.m. until 6 a.m. the next mornings. Northbound lanes will be closed from 11 p.m. until 6 a.m. during that same time frame.

The southbound US-101 off-ramp to Lucky Drive is scheduled to be closed between 10 p.m. and 6 a.m. The off-ramp to Lucky Drive is scheduled to be closed from 8 p.m. until 6 a.m.

The southbound on-ramp from westbound and eastbound Sir Francis Drake Boulevard is scheduled to be closed from 8 p.m. until 6 a.m.

The northbound US-101 on-ramp from Southbound Redwood Highway will be closed from 8 p.m. until 6 a.m.

This project will pave US-101 and the on- and off-ramps from Wornum Creek Undercrossing to the Miller Creek Bridge.

All work is weather dependent.

Detour for Southbound US-101 on-ramp from Lucky Drive

• Continue on Tamal Vista Boulevard
• Turn left on to Fifer Avenue
• Turn left on to Lucky Drive
• Turn right on to Doherty Drive
• Turn left on to Magnolia Avenue
• Turn left on to Redwood Avenue
• Continue on to Tamalpais Drive
• Use the right lane to merge on to Northbound US-101
• Head southeast on Fifer Avenue

Detour for Southbound on-ramp from Sir Francis Drake Boulevard

• Continue on to Sir Francis Drake Boulevard
• Turn left on to Northbound US-101
• Take the 451 off-ramp to Richmond Bridge/Francisco Blvd/I-580
• Turn right on to Bellam Boulevard
• Turn right on to Andersen Drive
• Turn right on to Francisco Boulevard West
• Turn right on to Southbound US-101

Detour for Northbound US-101 on-ramp from Redwood Highway

• From SB Redwood Highway, continue southeast on to Redwood Frontage Road
• Turn right on to Manuel T. Freitas Parkway
• Turn right on to Las Gallinas Avenue
• Turn right on to Lucas Valley Road
• Take Northbound US-101 on-ramp at Smith Ranch Road
• From NB Redwood Highway, continue on to Redwood Frontage Road
• Turn left on to Smith Ranch Road
• Merge on to Northbound US-101 at Smith Ranch Road

The target completion of the project is summer of 2027, weather permitting.