Caltrans has construction and closures planned for the following areas this week:
* The on and off ramps on Highway 99 from Taylor Road to Hammett Road will alternately from 7 p.m. to 7 a.m. through Saturday.
* The right shoulder, center and right lanes on Highway 99 from Taylor Road to the Stanislaus/San Joaquin County line will close from 7 p.m. to 7 a.m. through Saturday.
Motorists should expect 15 to 30 minute delays. Alternate routes should be taken whenever possible.