During the month of December, major construction activities will continue on U.S. 101 express lanes from I-380 in San Bruno to the San Mateo County/Santa Clara County. This includes work in Menlo Park from the Santa Clara County border to US 101/ Whipple Avenue affecting freeway shoulders and median, freeway ramps and potentially local city streets adjacent to the freeway. Minor activities will also occur north of Whipple Avenue on the freeway. 

Freeway shoulders and median
Intermittent lane closures will continue on northbound and southbound US 101 from 10 p.m. to 5 a.m., Sunday through Thursday night (and two Friday nights). Freeway work on the shoulders and median this month include: 

• installing median barrier aesthetic treatment
• installing median barrier signs
• installing traffic monitoring equipment

Freeway ramps
Temporary, nightly ramp closures will occur in/near East Palo Alto, Menlo Park, Redwood City, San Carlos, Belmont, San Mateo and Foster City. Ramp closures:

• will be displayed on changeable message signs
• will take place at night 
• will last three to eight hours
• will reopen by 5 a.m. daily
• will have detour signs posted

Northbound ramps at consecutive interchanges or southbound ramps at consecutive interchanges will not be closed at the same time. Work on the freeway ramps south of Whipple Avenue will continue periodically for restriping and installing temporary traffic monitoring equipment. In addition, as construction crews move temporary concrete barriers from the existing work area south of Whipple Avenue to the future work area north of Whipple Avenue, you may encounter temporary, nightly ramp closures in the above listed cities.  

City streets
Electrical service work will continue to occur on City Streets in Palo Alto, East Palo Alto, Menlo Park and Redwood City. This work will include PG&E energizing utility connection points on City Streets adjacent to the freeway. PG&E will be conducting additional outreach in these areas.  

Construction activities are subject to change.

For more information, visit the San Mateo 101 Express Lanes Project webpage, where you can sign up to receive construction updates. You can also follow @CaltransD4 on Twitter.