California Department of Transportation

10/09/2026 | Press release | Archived content

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

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

Published: Oct 09, 2026

Schedule: Monday, Oct. 12 through the morning of Saturday, Oct. 17

Marin County - Caltrans will continue its Capital Preventive Maintenance project along US-101 in October for paving as well as permanent pavement striping.

Various northbound and southbound lanes will be closed on Northbound and Southbound US-101 from Monday, Oct.12 through the morning of Saturday, Oct. 17 from 10 p.m. until 6 a.m. the next mornings.

The following northbound on-ramps ramps are scheduled to be closed during the week:

  • Northbound US-101 on-ramp from Redwood Highway, 7 p.m. to 6 a.m.
  • Northbound US-101 on-ramp from Manuel T. Freitas Parkway: 8 p.m. to 7 a.m.
  • Northbound US-101 on-ramp from Smith Ranch Road, 8 p.m. to 6 a.m.
  • Northbound US-101 on-ramp to Lucas Valley Road, 8 p.m. to 7 a.m.
  • Northbound US-101 on-ramp to Lincoln/Villa Ave. 8 p.m. to midnight
  • Northbound US-101 on-ramp to Industrial Way, 10 p.m. to 7 a.m.

The following southbound on-ramps ramps are scheduled to be closed during the week. All southbound closures are 8 p.m. to 6 a.m. the next mornings.

  • Southbound US-101 on-ramp to Francisco Boulevard
  • Southbound US-101 on-ramp to Lincoln Avenue
  • Southbound US-101 on-ramp to Merrydale Road
  • Southbound US-101 to N. San Pedro Road
  • Southbound US-101 on-ramps to Manuel T. Freitas
  • Southbound US-101 on-ramp to Lucas Valley Road

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

  • From Southbound Redwood, 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 Northbound 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

Detour for Northbound on-ramp loop from Manuel T. Freitas Parkway

  • Turn right on to Civic Center Drive
  • Turn right on to N. San Pedro Road
  • Turn right on to Northbound US-101

Detour for Northbound US-101 on-ramp to Smith Ranch Road

  • Continue on to Smith Ranch Road
  • Smith Ranch Road becomes Lucas Valley Road
  • Turn right on to Las Gallinas Avenue
  • Turn right on to Miller Creek Road
  • Turn left to Northbound US-101 on-ramp at Miller Creek Road

Detour for Northbound US-101 on-ramp loop from Lucas Valley Road

  • Head southeast on Lucas Valley Road
  • Continue on to Smith Ranch Road
  • Turn right on to Redwood Highway
  • Turn right to merge on to Northbound US-101

Detour for Northbound US-101 on-ramp from Lincoln Avenue

  • From the south, continue south on to Lincoln Avenue
  • Turn left on to Mission Avenue
  • Merge on to Northbound US-101
  • From the north, continue north on to Lincoln Avenue
  • Turn right on to N. San Pedro Road
  • Turn left on to Northbound US-101

Detour for Northbound US-101 on-ramp from Redwood

  • From Southbound Redwood Way, head south on Redwood toward Industrial Way
  • Continue on to Tamalpais Drive
  • Turn right to merge on to Northbound US-101 from Northbound Redwood
  • Head north on to Redwood Highway and turn right on to Rich Street
  • Head south on Redwood toward Industrial
  • Continue on to Tamalpais Drive
  • Turn right to merge on to Northbound US-101

Detour for Southbound US-101 Francisco Boulevard on-ramp closure

  • Continue northbound on Francisco Boulevard West
  • Turn left to stay on Francisco Boulevard West
  • Turn left on to Rice Drive
  • Turn right on to Andersen Drive
  • Turn right on to Lindaro Street
  • Turn right on to Second Street
  • Turn right to merge on to Southbound US-101
  • From Southbound Francisco Boulevard
  • Continue northeast on Francisco Boulevard West
  • Turn right on to Andersen Drive
  • Turn right on to Lindaro Street
  • Turn right on to Second Street
  • Turn right on to Southbound US-101

Detour for Southbound US-101 on-ramp to Lincoln Avenue

  • For northbound, head northwest on Lincoln Avenue
  • Continue on Los Ranchitos Road
  • Turn right on to N. San Pedro Road
  • Turn left on to Merrydale Road
  • Turn right to merge on to Southbound US-101
  • For southbound Lincoln Avenue, head southeast on Lincoln
  • Turn left on Second Street
  • Turn right to merge on to Southbound US-101

Detour for Southbound US-101 on-ramp to Merrydale Road

  • From westbound N. San Pedro, continue on to N. San Pedro Road
  • Turn left to merge on to Northbound US-101
  • Use the right lane to take Northbound US-101
  • Take the exit toward Manuel T. Freitas Parkway
  • Continue on to Freitas Parkway
  • Turn right to merge on to Southbound US-101

Detour for Southbound US-101 at North San Pedro Road

  • Head southwest on N. San Pedro Road toward Merrydale Road
  • Turn right on to Los Ranchtos Road
  • Continue on to Las Gallinas Avenue
  • Turn right on Del Presidio Boulevard
  • Turn right on to Freitas Parkway
  • Use the right lane to take Northbound US-101

Detour for Southbound US-101 loop to Manuel T. Freitas Parkway

  • Continue on to Freitas Parkway
  • Turn right onto Northbound US-101
  • Take the Lucas Valley Road off-ramp
  • Continue on to Lucas Valley Road
  • Turn left to merge on to Southbound US-101

Detour for Southbound US-101 westbound on-ramp to Manuel T. Freitas Parkway

  • Turn right on to Las Gallinas Avenue
  • Turn right on to Lucas Valley Road
  • Turn right to merge on to Southbound US-101

Bus stops along the aforementioned ramps may be affected.

For more on the overall project, see US-101 Capital Preventive Maintenance Project, Marin County | Caltrans

For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay
For real-time information, visit Caltrans QuickMap: https://quickmap.dot.ca.gov
Follow us on X: https://x.com/CaltransD4
Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.

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California Department of Transportation published this content on October 09, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 12, 2026 at 23:36 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]