101 Express Lanes Construction Update

***Note: Due to low traffic volumes, construction hours and lane closure times have been adjusted (see below for details).***

Construction Update — Week of May 24th

This Week: Construction activities on U.S. 101 will include: continued work on the sound walls along Bayshore Boulevard in the City of San Mateo (from Newbridge Avenue to just past Dakota Avenue, from Monte Diablo Avenue to Dore Avenue, and from Dore Avenue to East Poplar Avenue); pile driving in the area from Dore Avenue to East Poplar Avenue in the City of San Mateo; electrical service work; installing storm drainage systems; installing a new sewer system; installing sign foundations; 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.

Upcoming Sound Wall Demolition and Temporary Parking Changes

Construction timing: Demolition of the sound wall on South Bayshore Boulevard (in the City of San Mateo), adjacent to U.S. 101, is scheduled to begin the week of June 7, 2020. The work will involve removal of the wall from 2nd 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.

Extended Weekend Ramp Closures: Beginning the weekend of June 12th, extended weekend ramp closures are possible at ramps in/near the cities of San Carlos, Foster City, and San Mateo noted below in order to facilitate drainage system construction. Closures would begin after 10:00 PM on Saturday night and would reopen by 5:00 AM on Monday morning. Check changeable message signs for exact closure times and locations. Extended weekend ramp closures are possible at the following locations:

  • Southbound Holly Street On-Ramp/Brittan Avenue Off-Ramp Collector-Distributor Road
  • Southbound Hillsdale Boulevard On-Ramp from Eastbound Hillsdale Boulevard
  • Northbound Hillsdale Boulevard Off-Ramp
  • Northbound 3rd/4th Avenue Off-Ramp

Southbound Poplar Avenue On-Ramp

Sewer Work: Construction crews are planning to implement one-way daytime traffic control on South Bayshore Boulevard from Newbridge Avenue to Dakota Avenue in the City of San Mateo beginning the week of May 31st. 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.

Construction crews are continuing 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 7th.  

Pile Driving: Construction crews will be pile driving as part of sound wall reconstruction in the City of San Mateo along North Bayshore Boulevard from Dore Avenue to East Popular Avenue. 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 14th.

This work will also include:

  • Noise and vibration from pile driving as well as other common construction-related sounds such as back-up alarms
  • Water trucks being used to minimize dust during work hours
  • Traffic cones and flaggers to ensure safety of travelers

Nighttime Freeway Lane Closures: 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.

Freeway Ramp Closures: Temporary ramp closures may occur during the night in/near the cities of Redwood City, North Fair Oaks, San Carlos, Belmont, San Mateo, Foster City, Burlingame, Millbrae, San Bruno, and South San Francisco, as well as during the day in the City of San Mateo. 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 message near the ramp for exact closure times and locations.

Northbound Dore Avenue Off-Ramp

Nighttime ramp closures: Short-term nighttime ramp closures are possible the week of May 31st (Sunday night to Friday morning) at the following locations (listed from south to north). Check signs for exact closure times and locations.

  • Northbound/Southbound Route 84 Connector Ramp
  • Southbound Whipple Avenue Off-Ramp
  • Southbound Brittan Avenue On-Ramp
  • Southbound Harbor Avenue On-Ramp
  • Eastbound/Westbound Marine Parkway On-Ramp
  • Northbound Marine Parkway Off-Ramp
  • Eastbound/Westbound Ralston Avenue On/Off-Ramp
  • Eastbound/Westbound East Hillsdale Boulevard On/Off-Ramp
  • Southbound U.S. 101, Eastbound Route 92 Connector Ramp
  • Northbound U.S. 101, Eastbound/Westbound Route 92 Connector Ramp
  • Eastbound/Westbound 3rd Avenue On/Off-Ramp
  • Northbound Peninsula Avenue On-Ramp (Closures are possible lasting until 7:00 AM at this location)
  • Northbound Anza Boulevard On-Ramp
  • Northbound Broadway & Old Bayshore On/Off-Ramp
  • Eastbound/Westbound Millbrae Avenue Off-Ramp
  • Westbound I-380, Southbound U.S. 101 Connector Ramp

Nighttime ramp closures:

will be displayed on changeable message signs within the construction zone
will begin after 7:00 PM and reopen by 6:00 AM, unless otherwise noted above
will have detour signs posted

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

All construction activities are subject to change without notice.              

 

 

 

If you would like a copy of a prior construction update, please email 101express@dot.ca.gov.