Caltrans Orange County District 12

Caltrans Orange County District 12 Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from Caltrans Orange County District 12, Government Organization, 1750 E. 4th Street, Santa Ana, CA.

Caltrans District 12 encompasses the entirety of Orange County or 794 square miles, including 34 cities, 3 million people (as of 2009), and 17 state highway routes.

Your daily commute on the 405? A paleontologist signed off on that. 🦴There’s a whole world of discovery happening before...
06/17/2026

Your daily commute on the 405? A paleontologist signed off on that. 🦴

There’s a whole world of discovery happening before a single shovel hits the ground. Meet the Environmental Specialists making sure that millions of years of OC history and its wildlife aren’t lost to construction. 💚🍊

A huge thank you to the hardworking Maintenance teams who responded to the Garden Grove Chemical Spill Evacuation and ma...
05/27/2026

A huge thank you to the hardworking Maintenance teams who responded to the Garden Grove Chemical Spill Evacuation and managed road closures in the potentially hazardous area.

Our teams worked tirelessly through the holiday weekend, sacrificing time with their families to keep the public safe and make sure emergency responders could do their jobs effectively. They put themselves in harm’s way, worked long hours and handled this rapidly changing situation with skill and dedication.

From the bottom of our hearts, thank you for serving the people of Orange County. We appreciate you and all the work you do 🧡.

05/27/2026

The Garden Grove Hazmat Incident has been resolved. All lanes on Beach Boulevard are open.

Memorial Day weekend has some of the busiest travel days of the year. 🚐Before you head out, download the QuickMap app to...
05/21/2026

Memorial Day weekend has some of the busiest travel days of the year. 🚐

Before you head out, download the QuickMap app to check real-time traffic updates, lane closures, and road conditions so you can spend less time in traffic and more time enjoying the weekend. Know before you go!

🔗 Download QuickMap at the LINK IN BIO

May is National Bike Month. Here are some tips for bikers and drivers on how to safely share the roads.
05/21/2026

May is National Bike Month. Here are some tips for bikers and drivers on how to safely share the roads.

Think of all the litter floating around our state roads. How much came out of a car window, waiting to be picked up by a...
05/15/2026

Think of all the litter floating around our state roads. How much came out of a car window, waiting to be picked up by a Caltrans crew? Here is an example recently cleaned along CA-57 near the CA-22 Interchange in Santa Ana. 💙🚮

05/12/2026

Highways really do shape how we live every day. They connect families, expand access to jobs and opportunities, keep businesses moving, and help millions of people reach their destinations efficiently.

Safe to say we’re grateful for modern transportation infrastructure and the crews who keep them running. 🧡

🚧 Overnight Freeway Closure Alert 🚧Southbound I 405 will be fully closed Saturday, May 9, from 1–4 a.m., between MacArth...
05/07/2026

🚧 Overnight Freeway Closure Alert 🚧
Southbound I 405 will be fully closed Saturday, May 9, from 1–4 a.m., between MacArthur Blvd. and Jamboree Rd. as crews safely remove roadway signage.
✅ Detours will be in place
✅ Follow posted signs & slow down through construction zones

Asking for a sign? Look no further!Every Stop, Slow, Yield, and other highway signs you see throughout Orange County are...
05/05/2026

Asking for a sign? Look no further!

Every Stop, Slow, Yield, and other highway signs you see throughout Orange County are all made right here in our sign workshop in Orange!

Our Sign Crew can make up to 100 signs a month that are created with reflective material that can stay operational for decades. They work hard to install and maintain these signs so drivers can make safe and informed decisions on the road.

So the next time you drive by a sign, remember: it was made with love! 🧡

Address

1750 E. 4th Street
Santa Ana, CA
92705

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+16573286000

Website

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