The I-90 Southbound overpass at Highway 26 in Janesville may need some repair after a Thursday mid-day accident. The State Patrol reports an accident closed both lanes southbound on the Interstate a little after 11:00 a.m. Witnesses say two vehicles, a semi-trailer and military truck appear damaged. Skid marks show the military style vehicle appears to have careened into the guard rail, knocking concrete onto the roadway below. Emergency dispatch says two ambulances transported patients to the hospital.