Motorists driving eastbound on U.S. 20 in Dubuque will be rerouted through Thursday, Feb. 21. Traffic will detour onto North Cascade Road.

The detours will be 10 p.m. to 5 a.m. Monday until 5 a.m. Thursday, Feb. 21, weather permitting, according to the Iowa Department of Transportation’s Manchester construction office.

The detour is necessary as road crews set girders for the Dubuque Southwest Arterial (U.S. 52) bridge over U.S. 20 in Dubuque.

During this closure, traffic will be guided around the work zone by digital message signs and a marked detour. Westbound U.S. 20 will continue using the ramps to detour around the work zone as they have been for the last year. There will be no change to westbound traffic during the closure nights as they bypass the bridge. Local traffic may remain on U.S. 20 to reach residences up to Stone Valley Drive.