Construction activities on U.S. 101 will include: continued work on the sound walls along Bayshore Boulevard (from Newbridge Avenue to just past Dakota Avenue, from Monte Diablo Avenue to Dore Avenue, and from Dore Avenue to East Poplar Avenue), demolition of the sound wall along South Bayshore Boulevard from 2^nd Avenue to Monte Diablo Avenue, all within the City of San Mateo; pile driving; installing storm drainage systems, a new sewer system, and sign foundations; paving; electrical service work; and other related construction activities.  Most of the work will occur on the freeway lanes, shoulders, and ramps, while the sound wall and sewer work will occur on city streets adjacent to U.S. 101. More information is provided below. 

Construction timing: Demolition of the sound wall on South Bayshore Boulevard (in the City of San Mateo), adjacent to U.S. 101, began the week of June 7^th. The work involves removal of the wall from 2^nd Avenue to Monte Diablo Avenue and will take place from 8:00 AM – 5:00 PM, Monday through Friday. This section of sound wall is currently scheduled to be rebuilt by January 2021.

Parking information: During construction, on-street parking along South Bayshore Blvd in the construction area will be unavailable. In addition, South Bayshore Blvd will experience intermittent one-way traffic for the duration of sound wall construction. Please visit 101express.com for more information.

Construction crews continue to implement one-way traffic control on South Bayshore Boulevard from Newbridge Avenue to Dakota Avenue in the City of San Mateo. This one-way traffic control will occur from 8:00 AM – 5:00 PM and will allow for crews to install a temporary sewer bypass system. During this time, northbound traffic will remain on South Bayshore Boulevard and southbound traffic will be detoured towards Dakota Avenue. This work is anticipated to be completed in early July 2020.

Construction crews continue to implement daytime one-way traffic control on North Bayshore Boulevard from Monte Diablo Avenue to Dore Avenue in the City of San Mateo. This one-way traffic control will occur from 8:00 AM – 5:00 PM. During this time, northbound traffic will remain on North Bayshore Boulevard and southbound traffic will be detoured towards North Kingston Street. This work is anticipated to be completed the week of June 14^th.

Construction crews will be pile driving on and adjacent to northbound U.S. 101 in the City of San Mateo. Nearby residents and travelers can expect to see construction crews from 8:00 AM to 5:00 PM, Monday through Friday. Pile driving is anticipated to be completed the week of June 21^st.

This work will also include:

Nightly freeway lane closures may occur on northbound and southbound U.S. 101 from 7:00 PM to 6:30 AM, Sunday night to Friday morning. Due to low traffic volumes, project related traffic delays are anticipated to be minimal. Caltrans will continue to monitor traffic delays and make adjustments, as necessary.

Temporary ramp closures may occur during the day or night. Ramp closures could occur in 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.

Daytime ramp closures: Intermittent daytime closures are possible (Monday through Friday) in the City of San Mateo only at the following location from 8:30 AM to 4:30 PM. Check changeable messages near the ramp for exact closure times and locations.

Nighttime ramp closures: Short-term nighttime ramp closures are possible the week of June 14^th (Sunday night to Friday morning) in/near the cities of Redwood City, San Carlos, Belmont, San Mateo, Foster City, Burlingame, Millbrae, San Bruno, and South San Francisco, at the following locations (listed from south to north). Check changeable messages near the ramp for exact closure times and locations.

In addition to the sound wall and sewer work described above, electrical service work will occur on city streets in the cities of San Mateo and Burlingame to connect power to overhead signs and freeway lighting. Nearby residents and travelers can expect to see crews from 8:00 AM to 5:00 PM. This work will produce intermittent low vibrations and construction vehicle noise. This work will require temporary lane closures (one-way traffic). Lane closure(s):

Future construction activities for the next few weeks will include: removal of the sound wall on South Bayshore Boulevard from 2^nd Avenue to Monte Diablo Avenue in the City of San Mateo; continued work on other removed sound walls in the City of San Mateo; pile driving; installing sign foundations, storm drainage systems, and a new sewer system; paving; electrical service work; and other related construction activities.

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

Alejandro Lopez at (510) 286-4948 or . 

Visit our website at 101express.com for more information about the project or via Twitter @CaltransD4.