The San Joaquin River-Highway 99 six-lane widening project at the border of Fresno-Madera counties will cause a traffic switch this week starting at 7 p.m. Wednesday.
Caltrans said the contractor plans to divert and switch northbound traffic lanes towards the west onto the new southbound bridge.
It is anticipated that new traffic lane patterns will be in place by 5 a.m. Thursday morning, Caltrans said.
Once the switch is in place, two travel lanes in each direction, separated by concrete median barrier, will be in place until the northbound bridge structure is completed.
Drivers are advised to either use an alternative route or expect delays as the contractor initiates the traffic switch.
Scheduled closures and times are subject to change, and ramps located within the project limits may be closed if necessary.