Highway 104, westbound near Exit 4, is down to one lane until Friday, June 9 to replace a damaged girder on the overpass.
MacDonald Road, which runs over the highway, will be closed 24 hours per day until Friday, June 9.
Traffic will be detoured between Trunk 2 and Route 204 onto Robert Angus Drive. Work takes place from 7 a.m. to 7 p.m.