UPDATE on Highway 101
- February 15 2020

Article Source:  CalTrans


Project construction from Whipple Avenue (in Redwood City) to I-380 (in South San Francisco) 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 completion anticipated in 2022.  

 

Construction Update – Week of February 16th 

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 within the construction zone
  • will take place at night
  • will last three to eight hours
  • will reopen by 6:00 AM
  • will 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

 

Upcoming Construction: Future construction activities for the next few weeks will include continuing vegetation removal activities, installing erosion control protection, installing environmentally-sensitive area fencing, temporary freeway striping, setting up a Smart Traffic System, and installing construction/detour signs north of Whipple Avenue. In addition, sign installation, permanent striping, and erosion control hydroseeding will occur south of Whipple Ave.

 

All construction activities are subject to change without notice.

 

For questions during construction, contact the Caltrans Public Information Officer:    

Alejandro Lopez at (510) 286-4948 or 101express@dot.ca.gov.

 

Visit our website at 101express.com for more information about the project. Follow us on Twitter @CaltransD4.

 

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