Drivers on State Route 4 (SR-4) between the Old River Bridge near the Contra Costa/San Joaquin County line and South Whiskey Slough Road should expect ongoing delays. Overnight one-way traffic control will take place Sunday through Thursday nights, with delays of up to 30 minutes during active work.
There will also be two full 55-hour weekend closures from 10:00 p.m. Friday to 5:00 a.m. Monday, with exact dates to be announced. Detours will use Tracy Blvd, I-205, Mountain House Parkway, and Byron Road. Work is expected to continue through early 2027, so drivers should plan ahead and allow extra travel time…