Storm drain work along Alton Parkway east of Commercentre Drive means just one eastbound lane will be for about three weeks.
The lane closure begins in Irvine and continues into Lake Forest about 1,000 feet east of Commercentre Drive, according to the city of Lake Forest.
Once the eastbound project is finished, work will begin for storm drain installation on the westbound side of the road. The city will issue an update when the westbound work begins.