Caltrans began shifting traffic lanes in Stockton on northbound I-5 between Pershing Avenue and Country Club Boulevard early Tuesday morning as a part of the $46 million I-5 Rehabilitation Project.
Greg Lawson from Caltrans told FOX40 the speed limit in the construction zone will be reduced to 55 mph, and urges people to be patient while driving.
The lane shifts are estimated to be in place for six months.
Crews will be replacing the existing roadway to provide a smoother driving surface, and improve the pavement.
According to Caltrans, the left and middle lanes on northbound I-5 will be detoured onto the southbound traffic lanes.
Northbound commuters must stay in the right lane for on and off-ramp access to Monte Diablo Avenue, Country Club Boulevard and Pershing Avenue.
During this time, Caltrans is asking commuters to take alternate routes whenever possible.
John-Michael Kibrick contributed to this report.