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Posted on: March 11, 2019

Caltrans Road Project -- SR 142 (Carbon Canyon) March 18-December

On March 18 the California Department of Transportation (Caltrans) will begin a pavement rehabilitation project in Chino Hills on State Route (SR) 142 (Carbon Canyon).  The project is  eastbound and westbound from the Orange County line to Chino Hills Parkway. Weather permitting, the project will be completed by the end of December, 2019.  While this Caltrans project is in Chino Hills, traffic on Carbon Canyon Road in Brea will be intermittently impacted during work hours.

Please Note:  Throughout March, Caltrans will be installing construction area signs, implementing work station set up and placing all environmental preservation materials in place.  This initial work may require a shoulder closure, but should not require any lane closures. 

Once construction begins in earnest, intermittent lane closures will occur.  Flagging will be necessary, as there will only be one lane available during construction. Expect traffic delays; reduce your speeds and drive carefully.  Please see additional details below:

SR 142 Eastbound and Westbound from the Orange County line to Chino Hills Parkway
(Post mile markers from 0.00 to 3.87; going toward Chino Hills Parkway)

-Provide one through traffic lane (no less than 10 feet in width) for use by both directions.
-Flagging will be necessary as there will only be one lane available during construction.

Details of construction work hours:
Monday – Friday: 9 pm - 5 am (one lane for both directions)
11 am - 2 pm (one lane for both directions)
10 am-6 pm (shoulder will be closed)
Saturday: 1 am – 1 pm (one lane for both directions)
Sunday: 2 am – 1 pm (one lane for both directions)
9 pm – midnight (one lane for both directions)

SR 142 Eastbound from 3.87 Post mile marker to 5.78 (Chino Hills Parkway)
-One traffic lane will remain open at all times.

Details of construction work hours:

Monday – Friday: 9 pm – 7 am (one lane Eastbound will remain open)
10 am – 5 pm (shoulder will be closed)
Saturday: 9 pm – 7 am (one lane Eastbound will remain open)
Sunday: 9 pm- 7 am (one lane Eastbound will remain open)

 SR 142 Westbound from 3.87 Post mile marker to 5.78 (Chino Hills Parkway)
-One traffic lane will remain open at all times.

Details of construction work hours:
Monday – Friday: 11 pm – 6 am (one lane Westbound will remain open)
10 am – 5 pm (shoulder will be closed)
Saturday: 11 pm – 7 am (one lane Westbound will remain open)
Sunday: 11 pm- 7 am (one lane Westbound will remain open)

 Download the Caltrans News Release for more information and to view a map. 

Update June 5, 2019: There will be one-way traffic control from Wednesday, June 5 through Thursday, June 13. View the Caltrans News Release for more details.

Update June 18, 2019- Nighttime Lane Closures on Carbon Canyon Road June 18 through June 21 

Caltrans work continues on Carbon Canyon Road. You can still travel both directions, however, one-way traffic control will allow intermittent one direction travel through the work zone from June 17-21. Reduce your speed and expect delays.  The schedule includes both DAYTIME and NIGHT-TIME work. Be advised, weather conditions may affect the completion date of this project. View the Caltrans News Release for more details.

Tuesday, June 18  - 8:00 pm to 5:00 am
Westbound from Canon Lane to the Orange/San Bernardino County line

Wednesday, June 19 - 8:00 pm to 5:00 am
Eastbound from Orange/San Bernardino County line to Canon Lane

Thursday, June 20 - 8:00 pm to 5:00 am
Eastbound from Orange/San Bernardino County line to Canon Lane

Friday, June 21 - 8:00 pm to 5:00 am
Eastbound from Orange/San Bernardino County line to Canon Lane



Download Caltrans News Release
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