Caltrans District 4

Caltrans District 4 - Working to bring you safe, efficient, accessible, and environmentally responsible highways and bridges in the Bay Area.

[Caltrans District 4 @CaltransD4]

🚗✨ Heads up, Bay Area drivers! Before hitting the road, check #QuickMap for real-time traffic updates, closures, chain controls & more:📲 https://t.co/2qzyucWAwN
✅ Stay informed
✅ Drive safely
✅ #KnowBeforeYouGo

[511 SF Bay @511SFBay]

UPDATE: Residual Delays on Northbound US-101 Connector Ramp to Gravenstein Way in Cotati. All Lanes Open.

[Caltrans District 4 @CaltransD4]

#UPDATE WESTBOUND SR-24 Caldecott tunnel is back open! but expect delays bore 2 on EB Sr-24 remains closed please seek alternate routes and expect delays.

[Caltrans District 4 @CaltransD4]

Bore 3 is also closed.

[Caltrans District 4 @CaltransD4]

Bore 1 reopened as of 11:50 a.m.

[Caltrans District 4 @CaltransD4]

Bore 1 reopened as of 11:50 a.m.

[Caltrans District 4 @CaltransD4]

🚨 #TrafficAlert Caldecott Tunnel (EB SR-24)
A vehicle fire initiates closures of Bores #1 and #2 eastbound SR-24.
Motorists are advised to avoid the area if possible, expect significant delays, and be prepared for traffic control.
Emergency crews are on scene.

[Caltrans District 4 @CaltransD4]

Please use caution and follow directions from posted signs and personnel.

Check real-time traffic conditions: https://t.co/cipKtcceGE

[Caltrans District 4 @CaltransD4]

🚨 #TrafficAlert Caldecott Tunnel (EB SR-24)
A vehicle fire initiates closures of Bores #1 and #2 eastbound SR-24.
Motorists are advised to avoid the area if possible, expect significant delays, and be prepared for traffic control.
Emergency crews are on scene.

[Caltrans Central Coast (District 5) @CaltransD5]

Heads up, Boulder Creek travelers! Highway 9 will be fully closed overnight Wednesday, July 1, from 8 PM to 6 AM at the Kings Creek Bridge area for bridge construction work. Detours will be available, and signage is in place. Expect overnight noise and plan for extra travel time.

[511 SF Bay @511SFBay]

UPDATE: BART Resuming Normal Service.

[BART Alert @SFBARTalert]

There is a 20-minute delay on the Antioch Line in the SFO direction and a 10-minute delay in the Antioch direction due to a train being removed from service for a mechanical issue.

[NWS Bay Area 🌉 @NWSBayArea]

🌊Beach Hazards Statement is now in effect due to an increased risk of sneaker waves. Sneaker waves surge much further up the beach than expected and can sweep beach-goers into the ocean. Stay back from the water's edge! Never turn your back to the ocean! https://t.co/PHlOqOn3qj

[Caltrans District 4 @CaltransD4]

#TRAFFICALERT: Caltrans is scheduled to continue its project along US-101 from Wornum Drive to Corte Madera Creek in @maringov from Sunday, June 28 to Thursday, July 2. The Freitas and Lucky Drive ramps are closed on Sunday and Monday. @CaltransHQ

[Caltrans District 4 @CaltransD4]

Work is part of ongoing paving operations. Expect delays, follow posted detours, and allow extra travel time.
Check real-time traffic: https://t.co/cipKtcceGE
Thank you for your patience! #BeWorkZoneAlert

[Caltrans District 4 @CaltransD4]

🚧 UPDATE for SR-4 Overnight Full Closures (Brentwood)
Full closures of SR-4 in both directions are scheduled Sunday, June 28, 2026
8 PM – 8AM (Monday, June 29)
•Eastbound SR-4: Lone Tree Way → Walnut Blvd
•WB SR-4: Walnut Blvd → Balfour Rd
• WB SR-4 reopens at 5:00 AM

[Caltrans District 4 @CaltransD4]

🚧 Caldecott Tunnel Alert (WB SR-24)
Bore #4 closures 🗓 July 7 & 8
⏰ 10PM–4:30AM
Overnight maintenance work. At least one bore each direction stays open. Expect delays & be ready to merge.
Check traffic: https://t.co/cipKtcceGE
#BeWorkZoneAlert

[Caltrans District 4 @CaltransD4]

⚽🌎 The FIFA World Cup 26™ has everyone talking...but who are soccer players at Caltrans cheering for? 👀

If you're heading to a match or watching the action around the Bay Area, plan ahead by checking QuickMap and 511 before you hit the road.

#BayAreaMoves @CaltransHQ

[Caltrans District 4 @CaltransD4]

🚧 SR-4 Alert in Contra Costa
6/25 overnight closures:
•EB SR-4 Laurel Rd on-ramp FULL closure 8PM–8AM
•WB SR-4 One lane closure  between Balfour Rd → Sand Creek Rd 7PM–4AM
Drainage work. Expect delays, slow down & merge safely.
Check traffic: https://t.co/cipKtcceGE

[Caltrans District 4 @CaltransD4]

⚽🌉 Visiting the Bay Area for the FIFA World Cup 26™ SF Bay Area? Our Caltrans D4 Soccer League has a few tips before you hit the road.

Travel safely during FIFA World Cup 26™ SF Bay Area, and stay tuned for more tips from our Caltrans Soccer League. 🌎🚗

#BayAreaMoves

[Caltrans District 4 @CaltransD4]

Heading to a SF Bay Area FIFA World Cup 26™ match?

BART, Muni, light rail, ferries, and more can help you avoid traffic, skip parking stress, and get to games more smoothly.

Plan ahead, check schedules, and map your route before you go with QuickMap and 511.

#BayAreaMoves

[Caltrans District 4 @CaltransD4]

For the safety of the traveling public, Caltrans crews cleared an encampment site along U.S 101 at Matrix Blvd. in San Jose. Crews removed approximately 120 cubic yards of debris. 10 individuals were offered services. #BayArea #SantaClara #Caltrans