A half-mile stretch of Irving Park Road was closed Monday evening and will remain that way for four months after several truck drivers hit a new railroad bridge.

The Illinois Department of Transportation said truckers ignored a posted detour and struck the new flyover bridge, which just opened Sunday with a clearance of 12 feet, 6 inches.

It wasn't immediately known how badly the bridge was damaged, but IDOT officials closed Irving Park Road between York and the South Access Road, a stretch that officials say is used by about 37,000 vehicles each day.

South Access Road will remain open to O’Hare Airport cargo deliveries during the closure and accessible via the detour route, IDOT officials said.

Other vehicles will be detoured: