Millbrae 101 Express Lanes Construction Update – Week Of Sept. 13th

Press release from the City of Millbrae:

September 13, 2020

Caltrans is constructing express lanes on U.S. 101 from the San Mateo County/Santa Clara County Line to I-380 in South San Francisco. Construction is expected to be completed in mid-2022 with the full lanes opening to traffic late-2022.

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: setting and installing storm drainage structures; work on overhead signs; and paving. This will include work on the freeway median, shoulders and ramps, but no delays are anticipated. Short-term nighttime ramp closures are possible this week at locations south of Whipple Avenue. Planned ramp closure locations are provided below in the “Freeway Ramp Closures” section.

North of Whipple Avenue: Construction activities on U.S. 101 from Whipple Avenue to I-380 (in South San Francisco) will include: extended weekend ramp closures, as noted below; continued work on the removed sound walls along Bayshore Boulevard (from Newbridge Avenue to just past Dakota Avenue, from 2nd Avenue to Dore Avenue, and from Dore Avenue to East Poplar Avenue), all within the City of San Mateo. Additional work will include installing storm drainage systems, sign foundations, and permanent concrete barriers; grading and paving; electrical service work; removing temporary concrete barriers; roadway excavation; 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.

Sound Wall Work: Construction crews working on the sound walls continue to implement one-way traffic control periodically 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. One-way traffic control may occur from 8:00 AM to 5:00 PM, Monday through Friday. During this time, northbound traffic will remain on Bayshore Boulevard while southbound traffic will be detoured. Watch for detour signs. After 5:00 PM, the road will be restored to two-way traffic.

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. 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 September 13th (between Sunday night and 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). Signs near the ramps will have exact closure times and locations.

South of Whipple Avenue:

• Eastbound/Westbound Seaport Road, Northbound U.S. 101 On-Ramp
• Southbound U.S. 101, Eastbound/Westbound Route 84 (Woodside Road) Connector Ramp

North of Whipple Avenue:

• Eastbound/Westbound Whipple Avenue On/Off-Ramp (Closures possible starting at 5:00 PM at this location)
• Eastbound/Westbound Holly Street, Northbound U.S. 101 On Ramp
• Southbound Harbor Boulevard On-Ramp (Closures possible starting at 5:00 PM at this location)
• Southbound Ralston Avenue On/Off-Ramp (Closures possible starting at 5:00 PM at this location)
• Northbound Marine Parkway On/Off-Ramp (Closures possible starting at 6:00 PM at this location)
• Westbound East Hillsdale Boulevard On-Ramp
• Southbound U.S. 101, Eastbound/Westbound Route 92/Fashion Island Boulevard Connector Ramp
• Southbound Fashion Island Boulevard On-Ramp
• Southbound U.S. 101, Westbound Route 92 Connector Ramp
• Northbound Kehoe Avenue On/Off-Ramp
• Eastbound/Westbound 3rd/4th Avenue, Southbound U.S. 101 On -Ramp
• Southbound Poplar Avenue On/Off-Ramp
• Eastbound/Westbound Broadway & Old Bayshore, Southbound U.S. 101 On-Ramp
• Northbound Broadway & Old Bayshore On/Off-Ramp
• Eastbound Millbrae Avenue, Southbound U.S. 101 On-Ramp
• Westbound Millbrae Avenue, Southbound U.S. 101 On-Ramp
• Eastbound/Westbound Millbrae Avenue, Northbound U.S. 101 Off-Ramp
• Southbound S.F.O. Domestic Terminals On-Ramp
• Northbound Airport Boulevard On-Ramp
• Eastbound/Westbound I-380, Northbound U.S. 101 Connector Ramp
• Eastbound I-380, Northbound U.S. 101 Connector Ramp
• Southbound U.S. 101, I-380 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

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 intersections:

• Folkstone Avenue and South Amphlett Boulevard in the City of San Mateo
• Shaw Road and San Mateo Avenue in the City of South San Francisco

All construction activities are subject to change without notice. Visit http://101express.com/ to learn more.

This press release was produced by the City of Millbrae. The views expressed here are the author’s own.