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  7. 2021-01-17-101-express-update

2021-01-17-101-express-update

**Note: Daytime retaining wall work and ramp closures in the City of San Mateo and nighttime pile driving work in/near the cities of Belmont and San Carlos may occur the week of January 17th. Nighttime lane closures and ramp closures may occur Friday night, January 22nd to Saturday morning, January 23rd. See below for more details.

Construction Update – Week of January 17th

South of Whipple Avenue: This week, construction activities on U.S. 101 from San Antonio Road (in Palo Alto) to Whipple Avenue (in Redwood City) will include the installation of variable toll message signs and other minor construction activities.

North of Whipple Avenue: This week, construction activities on U.S. 101 from Whipple Avenue to I-380 (in South San Francisco) will include continued work near the removed sound wall along Bayshore Boulevard (from 2nd Avenue to Dore Avenue) within the City of San Mateo; nighttime pile driving in/near the cities of Belmont and San Carlos; and daytime retaining wall work in the City of San Mateo. Additional work will include the installation of stormwater drainage systems, overhead signs, and guardrail; grading; paving; shoulder and roadway excavation; stormwater drainage system maintenance; erosion control work; overhead sign work; removing guardrail; and other related construction activities.

Most of the work will occur on the freeway lanes, shoulders, and ramps, while sound wall work will occur on city streets adjacent to U.S. 101. More information is provided below.

Construction crews excavating material from the freeway shoulder

Construction crews excavating material from the freeway shoulder

Daytime Retaining Wall Work in the City of San Mateo

Construction crews will continue to install the foundation of a retaining wall using a hydraulic hammer (also known as pile driving) on Southbound U.S. 101, south of the on-ramp from East Hillsdale Boulevard in the City of San Mateo. This work is scheduled to take place from 1:00 PM to 9:00 PM. Noise and vibration from the intermittent use of a hydraulic hammer as well as other common construction-related sounds such as backup alarms should be anticipated. We estimate this work will conclude by the end of the week.

In addition, the closure of Eastbound East Hillsdale Boulevard to Southbound U.S. 101 On-Ramp and Westbound East Hillsdale Boulevard to Southbound U.S. 101 On-Ramp will be required for safety reasons.

Nighttime Pile Driving Work in/near the Cities of Belmont and San Carlos

Construction crews will be pile driving adjacent to the Harbor Boulevard, Southbound U.S. 101 On-Ramp in/near the cities of Belmont and San Carlos. Travelers may see construction crews between the hours of 8:00 PM to 5:00 AM. Noise and vibration from intermittent pile driving as well as other common construction-related sounds such as backup alarms should be anticipated. This work is scheduled to take place over 1 working night once initiated and is anticipated to be completed by the end of the week.

Sound Wall Work: Construction crews working on the sound wall on Bayshore Boulevard, from 2nd Avenue to Dore Avenue in the City of San Mateo, continue to implement periodic traffic control from 8:00 AM to 5:00 PM, Monday through Friday. Watch for detour signs. After 5:00 PM, the road will be restored to two-way traffic. We estimate this work will conclude in February.

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 Saturday morning. Due to low traffic volumes, project-related traffic delays are anticipated to be minimal. Caltrans continues to monitor the flow of traffic and make adjustments, as necessary.

Freeway Ramp Closures: 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: Short-term daytime ramp closures are possible the week of January 17th (between Monday afternoon and Friday Evening) in the City of San Mateo at the following locations, to support daytime retaining wall work. Changeable message signs near the ramps will have exact closure times and locations.

  • Eastbound East Hillsdale, Southbound U.S. 101 On-Ramp
  • Westbound East Hillsdale, Southbound U.S. 101 On-Ramp

Nighttime ramp closures: Short-term nighttime ramp closures are possible the week of January 17th (between Sunday night and Saturday 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). Changeable message signs near the ramps will have exact closure times and locations.

  • Eastbound Holly Street, Northbound U.S. 101 On-Ramp
  • Eastbound/Westbound Holly Street, Northbound U.S. 101 On-Ramp (Closures possible lasting until 8:00 AM at this location on Saturday, January 23rd)
  • Northbound U.S. 101, Northbound Holly Street Off-Ramp (Closures possible lasting until 8:00 AM at this location on Saturday, January 23rd)
  • South7bound U.S. 101, Westbound Holly Street Off-Ramp
  • Eastbound Harbor Boulevard, Southbound U.S. 101 On-Ramp
  • Eastbound Marine Parkway, Northbound U.S. 101 On-Ramp
  • Eastbound/Westbound Ralston Avenue, Southbound U.S. 101 On/Off-Ramp
  • Eastbound East Hillsdale Boulevard, Northbound U.S. 101 On-Ramp
  • Eastbound East Hillsdale Boulevard, Southbound U.S. 101 On-Ramp (Closures possible lasting until 8:00 AM at this location on Saturday, January 23rd)
  • Westbound East Hillsdale Boulevard, Southbound U.S. 101 On-Ramp
  • Southbound U.S. 101, Eastbound/Westbound East Hillsdale Boulevard Off-Ramp
  • Eastbound Route 92, Northbound U.S. 101 Connector Ramp
  • Eastbound/Westbound 3rd/4th Avenue, Northbound U.S. 101 On-Ramp (Closures possible lasting until 10:00 AM at this location on Saturday, January 23rd)
  • Northbound U.S. 101, Eastbound/Westbound 3rd Avenue Off-Ramp (Closures possible lasting until 8:00 AM at this location on Saturday, January 23rd)
  • Northbound U.S. 101, Eastbound Dore Avenue Off-Ramp
  • Northbound U.S. 101, Northbound Anza Boulevard On/Off-Ramp (Closures possible lasting until 9:00 AM at this location on Saturday, January 23rd)
  • Northbound U.S. 101, Northbound Broadway & Old Bayshore Off-Ramp
  • Northbound U.S. 101, Eastbound/Westbound Millbrae Avenue Off-Ramp
  • Northbound U.S. 101, Northbound Airport Boulevard On-Ramp (Closures possible lasting until 8:00 AM at this location on Saturday, January 23rd)
  • Eastbound/Westbound I-380, Northbound U.S. 101 Connector Ramp

Nighttime ramp closures:

  • Will be displayed on changeable message signs within the construction zoneWill begin after 7:00 PM and reopen by 6:00 AM, unless otherwise noted above
  • Will have detour signs posted
  • Upcoming Construction (South of Whipple Avenue): Construction activities in the coming weeks on U.S. 101 from San Antonio Road (in Palo Alto) to Whipple Avenue (in Redwood City) will include the installation of variable toll message signs; shoulder excavation; irrigation and planting work; and other minor construction activities.

Upcoming Construction (North of Whipple Avenue): Construction activities in the coming weeks on U.S. 101 from Whipple Avenue to I-380 (in South San Francisco) will include continued work on the removed sound wall in the City of San Mateo; the installation of guardrail, weigh-in-motion systems for measuring axle and vehicle weights, stormwater drainage systems, and permanent concrete barrier; shoulder excavation; grading; paving; restriping; overhead sign work; landscaping work; modifying lighting; and other minor construction activities.

All construction activities are subject to change without notice.

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

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

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