Caltrans District 4

🚗 Drivers — Before you hit the road, check our free #QuickMap app or visit QuickMap.dot.ca.gov for the latest updates on road closures, chain controls, and more. Stay informed, travel safe! 🛣️ #knowbeforeyougo #quickmap #drivesafely @CaltransHQ @CHP_HQ #caltransbayarea

#TRAFFICALERT: Caltrans has scheduled closing the SB US-101 to EB SR-37 connector ramp and the EB SR-37 to Marsh Dr. off-ramp as part of the Capital Preventive Maintenance Project in @maringov. Closures are from Monday, May 4 through Friday, May 8 from 3 a.m.-11 a.m. @CaltransHQ

#TRAFFICALERT: Caltrans will close the lower half of the Manzanita Park and Ride lot, along with the shoulder parking on State Route 1 in @maringov from Thursday, May 14 through Thursday, May 21 due to forecasted high-tide flood warnings. @CaltransHQ

#TRAFFICALERT: Caltrans is scheduled to close the NB off-ramp to Westbound Freitas Parkway and the shoulder adjacent to the northbound US-101 off-ramp to facilitate drainage improvements. Work is from Monday, May 4 until Friday, May 8 from 11 p.m.-5 a.m. each day. @maringov

Contra Costa County - Overnight full closures are scheduled on SR-4 (Marsh Creek Road) between Vasco Road & Byron Highway Closure Schedule: • Sunday, May 3 – Thursday, May 21 • Sunday–Thursday nights • 8PM – 5AM • May 3 closure begins earlier at 7:30 PM Full advisory ⬇️

Overnight lane closures are scheduled on eastbound I-580 at the Richmond–San Rafael Bridge. Lanes 1 and 2 will be closed nightly, and access from Stenmark Drive will remain open. • Dates: May 4 - June 30 • Days: Monday - Friday • Time: 9 PM - 6 AM View the full advisory👇

Heads up, Contra Costa County! 🚧 WB Bore 4 of the Caldecott Tunnel will be closed overnight from Monday, May 4 - Wednesday, May 6. All other bores will remain open. Closures begin nightly at 10 PM (9:30 PM on Wednesday) and reopen by 4:30 AM. Full Advisory ⬇️

#TrafficAlert Weekend Ramp Closure on I-80 at Solano Ave/Spring Rds. Starting tonight May 1 at 07:00PM and ending on May 4 at 05:00 AM Crews will be installing new traffic lights 🚦 that require access to the island 🏝️ for machinery and worker safety. @cityofvallejo

#UPDATE EB I-580 Richmond–San Rafael Bridge Daytime lane closures for the Substation Project are ending. Final closure: Fri 5/1 5 AM–2 PM (right shoulder only) All field work will pause after 5/1 and is expected to resume tentatively Nov 1, 2026.Expect minor delays. Stay alert!

More information on the I-280/Wolfe Road Interchange Improvements Project: vta.org/projects/i-280…

On Tuesday, Caltrans joined partners to celebrate the groundbreaking of the I-280/Wolfe Road Interchange Improvement Project in Cupertino. This project will bring a new Wolfe Road bridge over I-280, upgraded ramps and intersections, and improved bicycle and pedestrian access.

REMINDER: Caltrans Scheduled 55-Hour Full Weekend Closure of CA-4 Between Byron Highway in Contra Costa County and Roberts Road in San Joaquin County, Due to Roadwork. Today, 5/1 at 10:00 PM Through Monday, 5/4 at 5:00 AM. goo.gl/TU4ZDK

🔸Ramps: • Pinole Valley Rd WB On‑Ramp at 10 PM • McBryde Ave & San Pablo Dam Rd at 11 PM Thank you for your patience and remember for real time traffic and lane closures visit quickmap.dot.ca.gov

Fiber optic work continues along I-80 in Contra Costa County! Crews will be starting at 9PM -5AM near San Pablo Dam. Expect the following closures: 🔸EB I‑80: Lanes #3 & #4 from Pinole Valley Rd → Route 4 🔸Carquinez Bridge EB: Lanes #1 & #2 at 11 PM

Caltrans will end lane closures on the Richmond San Rafael Bridge (I-580) for maintenance tied to the substation project. The last closure is scheduled for Friday, May 1, 2026. Eastbound I-580: Right shoulder closed 5AM - 2PM. #RichmondCA #SanRafaelCA @CaltransD4

🚧 Traffic Update on El Camino Real in Burlingame Closures between Rosedale Ave. and Lincoln Ave. through Friday, May 1. Reminder: No left turns between Grove & Oxford (now) and E Bellevue & Peninsula (starting May 7). conta.cc/3OAIAwr #ECRRoadwayRenewal

Yesterday, Caltrans District 4 hosted the 3rd Annual Equity and Empowerment Expo, bringing together community members, partners, and local organizations for a day of resources, conversations, and connection. 🎉 We look forward to seeing you all next year!

🚧 Traffic Alert: ECR/SR-82 in San Mateo and Burlingame • April 29 at 6 pm – Aug 2026 ➡️ Two lanes closed from Grove - Oxford • May 7 – Aug 2026 ➡️ Two lanes closed from East Bellevue- Peninsula. More details here: conta.cc/4cYtTeI #ECRRoadwayRenewal

🚧 Day & night work ahead on US-101 in San Mateo County ☀️ Daytime: Partial ramp closures (7 a.m. – 5 p.m.) from Embarcadero Rd. to S. Airport Blvd. through May 29 🌙 Overnight: NB right lane closures (9 p.m. – 5 a.m.) from Whipple Ave. to Broadway Ave. thru May 20

#Trafficalert Overnight maintenance continues WB SR-24 at the Caldecott Tunnel Bore #4 🗓 April 29th and 30th 🕙 10 PM – 4:30 AM • Bore #4 (WB SR-24)

Sun–Thu nights, 9 PM–5 AM Closures between Barrett Ave & Pinole Valley Rd, including: • Solano Ave (WB on) 4/29 • McBryde Ave (WB off) 4/29–4/30 • Pinole Valley Rd (EB/WB ramps, alternating) 4/28–4/30 • San Pablo Dam Rd (WB on) 4/30 & 5/3

I-80 Overnight Work 🚧 Fiber optic work continues Wed night 10PM-5AM • EB I-80 lanes #3 & #4 CLOSED (Pinole Valley Rd → SR-4) • Pinole Valley Rd EB on/off-ramps CLOSED @ 10 PM • Solano Ave WB on-ramp CLOSED @ 9 PM • McBryde Ave & San Pablo Dam Rd ramps CLOSED @ 11 PM