The California Department of Transportation (Caltrans) will perform one-way traffic control on eastbound and westbound State Route 4 at the San Joaquin River Bridge for bridge work. Work is scheduled to begin Wednesday, Jan. 17 through Friday, Jan. 19 from 9 a.m. until 1 p.m. These repairs are being done to improve the bridge, roadway efficiency and safety for motorists traveling in San Joaquin County. Motorists should expect 10 minute delays.