Caltrans is doing overnight lane and ramp closures on Highway 99 through Manteca.

The closures between 8 p.m. and 5 a.m. will accommodate maintenance and construction work.

The work tonight through Friday involves alternating closures of the left, middle, and right lanes on northbound Highway 99 from Austin Road to Louise Avenue for pavement work.

At least one lane of traffic on northbound Highway  will be open at all times.

 Overnight, full off-ramp closures from northbound Highway 99 at Highway-120/Yosemite Avenue for pavement work takes place tonight through Friday.

Motorists should expect up to 15-minute delays.

All work is scheduled to begin as listed, but is subject to change due to traffic incidents, weather, availability of equipment, and/or materials and construction related issues.

For the safety of workers and other motorists, Caltrans asks motorists to stay alert.