2020-12-06-101-express-update
**Note: Daytime retaining wall work in the City of San Mateo and nighttime pile driving work in the City of San Carlos have both been postponed. See below for more details.
We hear you! Additional safety feature on Southbound U.S. 101: At the request of drivers, Caltrans has recently installed new reflective markers between temporary stripes and high-visibility button reflectors on temporary stripes on Southbound U.S. 101 from State Route 92 in the City of San Mateo to Whipple Avenue in Redwood City. The addition of reflectors increase roadway visibility and enhance safety during construction.
Construction Update – Week of December 6th
This Week: Construction activities on U.S. 101 from Whipple Avenue (in Redwood City) 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. Additional work will include installing stormwater drainage systems, guardrail, and temporary concrete barriers; grading; paving; roadway excavation; erosion control work; 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 leveling a new section of freeway shoulder
Extended Weekend Ramp Closure December 11th – 14th
Construction crews are planning to implement an extended weekend ramp closure during the weekend of December 11th at the Poplar Avenue to Southbound U.S. 101 On-Ramp in the City of San Mateo in order to rebuild the ramp.
The closure is scheduled to begin after 11:00 PM on Friday night, December 11th, and end by 6:00 AM on Monday morning, December 14th. Detour signs will be posted and changeable message signs will indicate exact closure times and locations.
Future extended ramp closures may include:
Eastbound Hillsdale Boulevard, Northbound U.S. 101 On-Ramp
Eastbound 3rd/4th Avenue, Northbound U.S. 101 On-Ramp
Poplar Avenue, Southbound U.S. 101 On-Ramp
Harbor Boulevard, Southbound U.S. 101 On-Ramp
Details about upcoming extended ramp closures will be provided ahead of the closures.
Daytime Retaining Wall Work in the City of San Mateo - Delayed
Retaining wall work in the City of San Mateo, initially scheduled to begin December 11th, has been temporarily delayed. Once work begins, construction crews will 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. This work is scheduled to take place from 1:00 PM to 9:00 PM and is anticipated to take place over 5 non-consecutive working days once initiated. 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.
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.
Check the “Construction Update” tab on the home page for schedule updates.
Nighttime Pile Driving Work in the City of San Carlos - Delayed
Nighttime pile driving in the City of San Carlos, initially scheduled to begin December 6th, has been temporarily delayed. Once work begins, construction crews will be pile driving on Northbound U.S. 101, adjacent to the on-ramp from Westbound Holly Street, in the City of San Carlos. This work will support the construction of a concrete barrier containing a ramp metering pole, that will manage the flow of traffic from the Westbound Holly Street on-ramp. Travelers may see construction crews between the hours of 8:00 PM to 5:00 AM.
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. Traffic control may occur 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.
Another Sound Wall Section Complete! The relocation of the section of sound wall along Bayshore Boulevard from Newbridge Avenue to just past Dakota Avenue in the City of San Mateo is now complete. On-street parking and two-way traffic have been restored to this area of Bayshore Boulevard. The remaining section of sound wall from 2nd Avenue to Dore Avenue is anticipated to be completed in February 2021.
Completed section of sound wall on Bayshore Boulevard from Newbridge Avenue to just past Dakota Avenue in the City of San Mateo”
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 the flow of traffic and make adjustments, as necessary.
Freeway Ramp Closures: Temporary ramp closures may occur during the 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.
Nighttime ramp closures: Short-term nighttime ramp closures are possible the week of December 6th (between Sunday night and Friday morning) in/near the cities of Redwood City, San Carlos, Belmont, San Mateo, Foster City, Burlingame, and Millbrae at the following locations (listed from south to north). Changeable message signs near the ramps will have exact closure times and locations.
- Eastbound Whipple Avenue, Northbound U.S. 101 On-Ramp
- Northbound U.S. 101, Whipple Avenue Off-Ramp
- Westbound Whipple Avenue, Northbound U.S. 101 On-Ramp
- Eastbound/Westbound Holly Street, Southbound U.S. 101 On/Off-Ramp
- Eastbound/Westbound Holly Street, Northbound U.S. 101 On-Ramp
- Northbound U.S. 101, Northbound Holly Street Off-Ramp
- Westbound Holly Street, Northbound U.S. 101 On-Ramp
- Eastbound Marine Parkway, Northbound U.S. 101 On-Ramp
- Westbound 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
- Westbound East Hillsdale Boulevard, Northbound U.S. 101 On-Ramp
- Northbound U.S. 101, Eastbound/Westbound East Hillsdale Boulevard Off-Ramp
- Southbound U.S. 101, Eastbound/Westbound East Hillsdale Boulevard Off-Ramp
- Eastbound Route 92, Northbound U.S. 101 Connector Ramp
- Northbound U.S. 101, Eastbound/Westbound Route 92 Connector Ramp
- Eastbound 3rd Avenue, Northbound U.S. 101 On-Ramp
- Eastbound/Westbound 3rd/4th Avenue, Northbound U.S. 101 On-Ramp (Closures possible starting at 4:00 PM at this location)
- Eastbound/Westbound 3rd/4th Avenue, Southbound U.S. 101 On/Off-Ramp
- Northbound U.S. 101, Eastbound/Westbound 3rd Avenue Off-Ramp
- Northbound U.S. 101, Peninsula Avenue Off-Ramp (Closures possible lasting until 7:00 AM at this location)
- Northbound U.S. 101, Eastbound/Westbound Millbrae Avenue Off-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: Construction activities in the coming weeks on U.S. 101 from Whipple Avenue (in Redwood City) to I-380 (in South San Francisco) will include: continued work on the removed sound wall in the City of San Mateo; daytime retaining wall work in the City of San Mateo; nighttime pile driving in the City of San Carlos; installing guardrails, temporary concrete barriers, overhead signs, stormwater drainage systems, temporary lighting, and temporary ramp metering; grading; paving; roadway excavation; striping; erosion control work; and other related construction activities.
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.