2021-03-07-101-express-update

This page has been updated to reflect new ramp closure information. See “nighttime ramp closures” below for the up-to-date list of potential ramp closure locations.

**Note: Overnight ramp closures will take place the weekend of March 6th (between Saturday night and Sunday morning) in the City of San Mateo. See “Weekend overnight closures” below for more details.

Construction Update – Week of March 7th

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) include variable toll message sign work and 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) include continued work near the completed sections of sound wall on Bayshore Boulevard in the City of San Mateo (more information below); installation of stormwater drainage systems, permanent and temporary concrete barriers, new electrical boxes, lighting, traffic monitoring system components, and guardrails; temporary restriping; concrete and barrier demolition; overhead sign work; landscaping and erosion control work; electrical service work; shoulder excavation; removing temporary concrete barriers; and minor construction activities.

Most of the work will occur on the freeway lanes, shoulders, and ramps, while sound wall work and electrical service work will occur on city streets adjacent to U.S. 101. Construction activities may occur during the day or night, and noise from construction-related sounds such as backup alarms and hammering should be anticipated.

A section of future roadway under construction

A section of future roadway under construction

Overhead Sign Structure Removal on U.S. 101: Caltrans removed five overhead sign structures on U.S. 101 during the week of February 28th. This work required construction crews to close one direction of the freeway at a time between Millbrae Avenue in the City of Millbrae and South Airport Boulevard in the City of South San Francisco for five nights. Additional overnight freeway closures will be required in the future to remove overhead sign structures in other areas, as early as Spring 2021, and install new overhead sign structures. Stay tuned to our weekly construction updates and visit the “Upcoming Overnight Closures on U.S. 101” page on 101express.com for updates. Thank you for your patience during this time!

Sound Wall Work – Final Section Rebuilt! Rebuilding of the final section of sound wall, from 2nd Avenue to Dore Avenue in the City of San Mateo, is complete. Minor construction activities, such as paving, will continue to occur near the completed sections of sound wall on Bayshore Boulevard (from Newbridge Avenue to just past Dakota Avenue, from 2nd Avenue to Dore Avenue, and from Dore Avenue to East Poplar Avenue) in the City of San Mateo. This work may require periodic traffic control on Bayshore Boulevard from Newbridge Avenue to East Poplar Avenue, between 8:00 AM and 5:00 PM, from Monday to Friday. All sound wall-related work is anticipated to be complete by mid-March.

Completed section of sound wall on Bayshore Boulevard from Dore Avenue to East Poplar 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, Saturday 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.

Weekend overnight closures: Short-term nighttime ramp closures are possible the weekend of March 6th (between Saturday night and Sunday morning) in the City of San Mateo at the following locations (listed from south to north). Changeable message signs near the ramps will have exact closure times and locations:

Westbound East Hillsdale, Southbound U.S. 101 On-Ramp (Closures possible lasting until 9:00 AM at this location)
Northbound U.S. 101, Eastbound/Westbound 3rd Avenue Off-Ramp (Closures possible lasting until 8:00 AM at this location)
Eastbound 3rd Avenue, Northbound U.S. 101 On-Ramp (Closures possible lasting until 11:00 AM at this location)

Nighttime ramp closures: Short-term nighttime ramp closures are possible the week of March 7th (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 Whipple Avenue, Northbound U.S. 101 On-Ramp
Northbound U.S. 101, Whipple Avenue Off-Ramp (Closures possible starting at 4:00 PM at this location)
Westbound Whipple Avenue, Northbound U.S. 101 On-Ramp (Closures possible starting at 6:00 PM at this location)
Westbound Whipple Avenue, Southbound U.S. 101 On-Ramp
Brittan Avenue, Southbound U.S. 101 On-Ramp
Eastbound Holly Street, Northbound U.S. 101 On-Ramp
Eastbound/Westbound Holly Street, Southbound U.S. 101 On/Off-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
Northbound U.S. 101, Northbound Marine Parkway Off-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, Southbound U.S. 101 On-Ramp
Eastbound East Hillsdale Boulevard, Northbound U.S. 101 On-Ramp (Closures possible lasting until 9:00 AM on Saturday, March 12th at this location)
Southbound U.S. 101, Eastbound/Westbound East Hillsdale Boulevard Off-Ramp
Northbound U.S. 101, Eastbound/Westbound East Hillsdale Boulevard Off-Ramp (Closures possible lasting until 7:00 AM at this location)
Westbound East Hillsdale Boulevard, Southbound U.S. 101 On-Ramp (Closures possible lasting until 9:00 AM on Saturday, March 12th at this location)
Westbound East Hillsdale Boulevard, Northbound U.S. 101 On-Ramp (Closures possible starting at 6:00 PM at this location)
Eastbound Route 92, Northbound U.S. 101 Connector Ramp
Eastbound Route 92, Southbound U.S. 101 Connector Ramp
Northbound U.S. 101, Eastbound/Westbound Route 92 Connector Ramp
Kehoe Avenue, Northbound U.S. 101 On/Off-Ramp
Eastbound/Westbound 3rd Avenue, Northbound U.S. 101 On/Off-Ramp
Eastbound/Westbound 3rd/4th Avenue, Northbound U.S. 101 On-Ramp (Closures possible lasting until 10:00 AM on Saturday, March 12th at this location)
Westbound 3rd Avenue, Southbound U.S. 101 On-Ramp (Closures possible lasting until 8:00 AM on Saturday, March 12th at this location)
Eastbound Millbrae Avenue, Northbound U.S. 101 On-Ramp
Westbound Millbrae Avenue, Northbound U.S. 101 On-Ramp
Northbound U.S. 101, SFO Off-Ramp
Airport Boulevard, Northbound U.S. 101 On-Ramp
Northbound U.S. 101, Northbound Airport Boulevard Off-Ramp
Eastbound/Westbound I-380, Northbound 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

City Streets: In addition to the sound wall activities described above, work to connect power to overhead signs and freeway lighting will occur on city streets in the cities of San Mateo and South San Francisco. Nearby residents and travelers can expect to see crews from 8:00 AM to 5:00 PM, Monday through Friday. This work will produce intermittent low vibrations and construction vehicle noise, and will also require temporary lane closures (one-way traffic). Cones and flaggers will safely direct traffic around closures. Electrical service work may occur near the following streets and intersections:

On 19th Avenue in the City of San Mateo
19th Avenue and Fashion Island Boulevard in the City of San Mateo
South Amphlett Boulevard and 10th Avenue in the City of San Mateo
South Airport Boulevard and Wondercolor Lane in the City of South San Francisco
On South Airport Boulevard in the City of South San Francisco

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 shoulder excavation, landscaping work, and 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 minor activities near the completed sections of sound wall in the City of San Mateo; the installation of guardrails, stormwater drainage systems, traffic monitoring system components, lighting, new electrical boxes, and permanent and temporary concrete barriers; grading; paving; temporary restriping; removing temporary concrete barriers; landscaping and erosion control work; overhead sign work; concrete and barrier demolition; roadway milling and excavation; stormwater drainage system maintenance; electrical service work; and minor construction activities.

All construction activities are subject to change without notice.

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

Alejandro Lopez at (510) 385-6856 or 101express@dot.ca.gov.

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.

2021-03-07-101-express-update

This page has been updated to reflect new ramp closure information. See “nighttime ramp closures” below for the up-to-date list of potential ramp closure locations.

Construction Update – Week of March 7th

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

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