Closures from 8:00 PM, Friday, April 19, until 5:00 AM, Monday, April 22
Full Eastbound closures at night; one lane open during the day
SANTA ROSA – As part of a paving and concrete slab replacement project, Caltrans will alternate partial and full closures of eastbound State Route 12 in Santa Rosa between the Dutton Avenue exit and the Downtown, S. “E” Street exit between 8:00 PM, Friday, April 19, and 5:00 AM, Monday, April 22, 2024.
The closures will be divided into day and night shifts. During night closures, the eastbound freeway between Dutton Avenue and Downtown S. “E” Street will be fully closed. During day closures, one eastbound lane will be open, and one lane will be closed.
During day closures, motorists who wish to connect from eastbound Route 12 to US Hwy 101 will be detoured. See Map #1 below.
At night, motorists heading eastbound on Route 12 past Dutton Avenue will follow Map #2.
Westbound Route 12 will not be affected.
During the night shifts (8:00 PM – 8:00 AM), the eastbound direction of the freeway will be fully closed until 8:00 AM, except on Monday, April 22, when the closure ends at 5:00 AM. Detours will guide motorists around the closed portion of the freeway.
During the day shifts (8:00 AM – 8:00 PM), one of two lanes in the eastbound direction will be closed. Motorists traveling eastbound on SR-12 between Dutton Avenue and S. “E” Street should prepare for significant delays or choose an alternative route.
Caltrans chose to implement full nighttime and partial daytime freeway closures to accelerate the demolition and replacement of concrete slab work that may take up to a year if performed during typical nighttime lane closures. Also, full nighttime closures are safer for workers and motorists.
Nighttime Closures
Full Nighttime Closures on Eastbound Route 12
Friday, April 19 from 8:00 PM until8:00 AM on Saturday,April 20.
Saturday, April 20, from 8:00 PM until8:00 AM on Sunday, April 21.
Sunday, April 21, from 8:00 PM until 5:00 AM on Monday, April 22.
Daytimes Closures
One Lane Closure on Eastbound Route 12 (One of two lanes will be closed)
Saturday, April 20 from 8:00 AM until 8:00 PM
Sunday, April 21 from 8:00 AM until 8:00 PM
Map 1 - Daytime detour for eastbound Route 12 traffic heading to Hwy 101
Map 2 - Nighttime eastbound Route 12 through traffic heading east of Dutton Avenue.
The slab replacement is part of a larger project to rehabilitate a three-mile stretch of SR-12 between Llano Road and Farmers Lane in Santa Rosa, which began in June 2023
For more information about this project: Highway 12 Paving in Santa Rosa
No Conflict with Concurrent Route 37 Closures
The Route 12 closures run concurrently with weekend closures on westbound Route 37 in Solano, Napa, and Sonoma counties.
Caltrans traffic operational analysis found no conflicts between the closures because Route 12 closures will affect eastbound traffic while the Route 37 closures will affect westbound traffic.
For information about Route 37 Closures: State Route 37 Pavement Project
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