Caltrans Announces Extensive 55-Hour Lane Closures on California's 101 for Median Barrier Upgrades

This closure is the sixth of nine planned 55-hour single-lane closures.Photo bySandy MillaronUnsplash

San Mateo/Santa Clara Counties, CA – Caltrans Bay Area-District 4 has announced a 55-hour lane closure on U.S. 101 starting Friday, September 27, at 10:00 PM and continuing until Monday, September 30, at 5:00 AM. The closure, part of a project to upgrade the median barrier, will affect both northbound and southbound express lanes (#1 lane) over a 2.5-mile stretch between the San Mateo/Santa Clara County line and Whipple Avenue.

This closure is the sixth of nine planned 55-hour single-lane closures. While the express lanes will be closed, additional lanes may also experience temporary closures to accommodate construction equipment and materials.

Upcoming Closures:

• October 25 - October 28
• November 1 - November 4
• November 15 - November 18

Drivers are encouraged to stay informed about traffic conditions by visiting 511.org for updates and Caltrans QuickMap for real-time traffic information.

These upgrades are crucial for improving the safety and efficiency of U.S. 101, but motorists should plan for possible delays during the closure periods.