Five straight nighttime closures await drivers on Highway 99 at Austin Road in south Manteca.
They are part of the $48.2 million upgrade to the interchange with Highway 120, a key commuter link to the Bay Area.
The northbound lanes on 99 will be closed between Sunday, Jan. 25, and Friday, Jan. 30, from 10 p.m. to 4 a.m. each time. The southbound side will shut down between Monday and Friday, 11 p.m. to 5 a.m…