**Note: Pile driving on U.S. 101 will occur starting the week of October 25th in the City of San Mateo. See below for more details.
Construction Update – Week of October 18th
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 paving and other minor construction activities. This work will take place on the freeway shoulders 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: continued work in the area near 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 stormwater drainage systems, sign foundations, guardrails, temporary lighting, temporary ramp metering, and permanent concrete barriers; electrical service work; grading; paving; landscaping 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 installing a new stormwater drainage system
Upcoming Pile Driving in the City of San Mateo
During the week of October 25th, pile driving will occur on southbound U.S. 101, adjacent to the On-Ramp from eastbound East Hillsdale Boulevard and freeway lanes in the City of San Mateo. The project team is working with the City of San Mateo to determine the appropriate work hours to minimize noise disturbance to local residents and increased traffic on city streets. The work will include intermittent noise and vibration from pile driving, as well as other common construction-related sounds such as back-up alarms. Residents in close proximity to the pile driving will notice increased noise and vibration. This work is anticipated to take place over 5 days, starting on Tuesday, October 27th and ending the week of November 1st.
In, addition this work may require the closure of two southbound U.S. 101 on-ramps from East Hillsdale Boulevard:
- Eastbound East Hillsdale Boulevard, Southbound U.S. 101 On-Ramp
- Westbound East Hillsdale Boulevard, Southbound U.S. 101 On-Ramp
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.
First Sound Wall Nearing Completion: Construction activities associated with removing and relocating the section of sound wall along Bayshore Boulevard from Dore Avenue to East Poplar Avenue in the City of San Mateo are scheduled to conclude by Friday, October 23rd, at which point the section of Bayshore Boulevard adjacent to the sound wall will reopen 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 October 18th (between Sunday night and Friday morning) in/near the cities of Redwood City, San Carlos, Belmont, San Mateo, Foster City, Burlingame, 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.
South of Whipple Avenue:
- Eastbound/Westbound Seaport Boulevard, Northbound U.S. 101 On-Ramp
North of Whipple Avenue:
- Northbound U.S. 101, Whipple Avenue Off-Ramp (Closures possible starting at 6:00 PM at this location)
- Westbound Whipple Avenue, Southbound U.S. 101 On-Ramp (Closures possible starting at 5:00 PM at this location)
- Brittan Avenue, Southbound U.S. 101 On-RampEastbound/Westbound Holly Street, Northbound U.S. 101 On/Off-RampEastbound/Westbound Holly Street, Southbound U.S. 101 On/Off-Ramp
- Southbound U.S. 101, Eastbound/Westbound Harbor Avenue Off-Ramp
- Westbound Holly Street, Northbound U.S. 101 On-Ramp (Closures are possible starting at 6:00 PM at this location)
- Southbound U.S. 101, Eastbound/Westbound Ralston Avenue On/Off-Ramp
- Eastbound East Hillsdale, Southbound U.S. 101 On-Ramp
- Westbound East Hillsdale, Northbound U.S. 101 On-Ramp
- Eastbound/Westbound Fashion Island Boulevard, Northbound U.S. 101, On-Ramp
- Westbound Route 92, Northbound U.S. 101 Connector Ramp
- Northbound U.S. 101, Kehoe Avenue Off-Ramp
- Eastbound/Westbound 3rd/4th Avenue, Northbound/Southbound U.S. 101 On/Off-Ramp
- Westbound 3rd Avenue, Southbound U.S. 101 On-Ramp
- Southbound U.S. 101, Poplar Avenue On/Off-Ramp
- Northbound U.S. 101, Peninsula Avenue Off-Ramp (Closures possible starting at 6:00 PM and lasting until 7:00 AM at this location)
- Northbound Anza Boulevard, Northbound U.S. 101 On-Ramp
- Northbound U.S. 101, Broadway & Old Bayshore Off-Ramp
- Northbound U.S. 101, Northbound Airport Boulevard Off-Ramp
- Eastbound/Westbound Route 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, electrical service work to connect power to overhead signs and freeway lighting will occur on city streets in the City of San Mateo. 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:
- 19th Avenue and Fashion Island Boulevard in the City of San Mateo
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 removed sound walls in the City of San Mateo; pile driving in the City of San Mateo; installing overhead signs, temporary concrete barriers, permanent concrete barriers, guardrails, temporary lighting, temporary ramp meters, and stormwater drainage systems; restriping; electrical service work; grading; paving; roadway excavation; landscaping work; and other related 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 email@example.com.
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 firstname.lastname@example.org.