Sr-4 To Be Closed From Discovery Bay Boulevard In Contra Costa County To Tracy Boulevard In San Joaquin County
The California Department of Transportation (Caltrans) will perform a 55-hour full highway closure of State Route 4 (SR-4), just west of the Middle River Bridge, as part of a culvert rehabilitation project that will make necessary upgrades and repairs to culverts and drainage systems.
An existing 36-inch corrugated metal pipe will be removed and replaced with a 42-inch reinforced concrete pipe to extend the service life of the stormwater drainage systems and to ensure traffic safety, reliability, and integrity of the highway system.
The full closure will begin at 10:00 p.m. on Friday, September 17, until 5:00 a.m. on Monday, September 20, 2021.
- Westbound SR-4 travelers: The detour begins at the Tracy Boulevard intersection; south on Tracy Blvd; west on I-205; north on Mountain House Parkway; northwest on Byron Road to SR-4.
- Eastbound SR-4 travelers: The detour begins at the Byron Road intersection; southeast on Byron Road; south on Mountain House Parkway; east on I-205; north on Tracy Blvd to SR-4.
- Restricted access past these locations will only be allowed for emergency vehicles and those trying to reach local businesses and work locations within the closure.
See the full Caltrans press release (PDF).