Millbrae 101 Express Lanes Construction Update

From the City of Millbrae:

February 19, 2020

Project construction from Whipple Avenue to I-380 in San Mateo County is underway! Caltrans is constructing express lanes on U.S. 101 from the San Mateo County/Santa Clara County line to I-380 in South San Francisco. Construction is expected to occur between 2019 and 2022.

North of Whipple Avenue: This week, construction activities on U.S. 101 from Whipple Avenue (in Redwood City) to I-380 (in South San Francisco) will include removing vegetation, installing a Smart Traffic System of changeable message signs placed in the construction zone that shows real-time traffic conditions, installing environmentally-sensitive area fencing, and temporary freeway striping. This work will occur on the freeway lanes, shoulders, and ramps. See below for more information about those activities.

Freeway Lane Closures: This week, nightly freeway lane closures will begin on northbound and southbound U.S. 101 from 10:00 PM – 5:30 AM, Sunday through Thursday night. Expect delays below 15 minutes from 10:00 PM – 6:00 AM. Up to 3 lanes may be closed each night.

Freeway Ramp Closures: Temporary, nightly ramp closures will occur in/near Redwood City, San Carlos, San Mateo, San Bruno, and South San Francisco. Ramp closures could occur on both the northbound and southbound directions of the freeway. However, consecutive interchanges for northbound and southbound ramps will not be closed at the same time.

Ramp closures will:

• Be displayed on changeable message signs in the construction zone

• Take place at night

• Last three to eight hours

• Reopen by 6:00 AM daily

• Have detour signs posted

Short-Term nighttime ramp closures are possible this week at the following locations (listed from south to north). Check signs for exact closure times and locations.

• Eastbound and Westbound Holly Street On/Off Ramp

• Southbound 3rd/4th Avenue Southbound On/Off Ramp

• Northbound 3rd Avenue Northbound Off Ramp

• Eastbound and Westbound San Bruno Avenue On Ramp

• U.S. 101/I-380 Connector Ramp

South of Whipple Ave: This week, construction activities on U.S. 101 from San Antonio Road (in Palo Alto) to Whipple Avenue (in Redwood City) will include minor construction activities to connect to existing electrical and install median signs. This will include work on the freeway median, shoulders, and ramps. Delays are not anticipated for this work. Short-Term nighttime ramp closures are possible this week at the following location. Check signs for exact closure times and locations.

• Northbound Whipple Avenue On/Off Ramp

Visit http://101express.com/ to learn more.

This press release was produced by the City of Millbrae. The views expressed here are the author’s own.