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Caltrans District 4
Caltrans District 4 - Working to bring you safe, efficient, accessible, and environmentally responsible highways and bridges in the Bay Area.
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Caltrans District 4 6h
Our QuickMap app is useful to help avoid slow traffic & closures. Get the FREE app & check it before you travel-
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Caltrans District 4 21h
SR-121 Sarco Creek Bridge now open! Sunday, November 19.
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Caltrans HQ Nov 19
Please don't litter! Roadway litter negatively impacts our budget, safety, & environment. If you'd like to help-
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Caltrans District 4 Nov 19
You can also like us on Facebook at
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KCBS Traffic Nov 18
Half Marathon important information for road closures and detours.
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KCBS Traffic Nov 18
Did you know? Long distance interstate highways that run east and west are even numbered, and highways that run north and south are odd numbered.
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Caltrans District 4 Nov 18
Traveling this weekend? Click here for a list of rest stops along roadways
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Caltrans District 4 Nov 17
set to open new SR-121 Sarco Creek Bridge in this coming week! Thank you to motorists and the community as we maintain our state's highways and bridges.
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Caltrans District 4 Nov 17
REMINDER: WB I-80 at Midway in night closures RAIN or SHINE start TONIGHT NOV 17 at 11:59 PM ICYMI see our I-80 Midway Bridge video!
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Caltrans District 4 Nov 17
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Caltrans HQ Nov 16
Stay informed with the Mile Marker, a quarterly performance report. Updates on SB1 projects & more!
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Caltrans District 3 Nov 17
Our Echo Summit traffic camera looks like a picture today. Check out all our highway cameras at:
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Caltrans District 4 Nov 17
Here is Why Runaway Truck Ramps Exist
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Caltrans District 4 Nov 16
Caltrans and discussing plans for the Gleason Beach Realingment Project with the community of Bodega Bay.
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Caltrans HQ Nov 15
Traveling to or through the mountains this winter? Be prepared for winter driving conditions. Tips & info-
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Caltrans District 4 Nov 16
In Solano County, overnight maintenance closure on SR-84 Real McCoy Ferry starts TONIGHT Nov16 at 10PM til Nov17 at 4AM. Use J Mack Ferry or Miners Slough Bridge as detour.
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Caltrans District 4 Nov 16
REMINDER: EB I-80 at Midway in night closures RAIN or SHINE start TONIGHT NOV 16 at 11:59 PM ICYMI see our I-80 Midway Bridge video!
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Caltrans District 4 Nov 16
Sonoma County - Gleason Beach Roadway Realignment Project informational meeting tonight at Grange Hall, 1370 Bodega Ave, Bodega Bay. 6:00PM-7:30PM
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Caltrans District 4 Nov 16
"Adopt a highway and make a difference! Learn more Caltr"
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511 SF Bay Nov 16
Ongoing: Overturned Truck Accident on CA-121 South of Ramal Rd in Napa County. All Lanes Closed in Both Directions.
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