Drivers can expect a nighttime detour once again for the Highway 99/120 interchange upgrade in Manteca.
It will begin at 8 p.m. Wednesday, May 27, on the ramp from eastbound 120 to southbound 99. The ramp will reopen at 4 a.m. Thursday. The detour will be repeated at the same hours from Thursday night into Friday morning. It will be about a mile north on 99 to the Yosemite Avenue interchange.
The $48.2 million project will add a second lane to this ramp and a fourth lane on southbound 99 to Austin Road. It also includes a new bridge for Austin and connections to major roads in south Manteca…