About 1:30 p.m. Wednesday, a 76-year-old man drove his Audi Q5 onto the sidewalk near the Commander's House  which is just north of Legacy Bridge, said University of Utah Police Sgt. Smith. For some reason, the man kept driving down the walkway and onto the bridge, which spans Mario Capecchi Drive between the student dormitories on its north end and the soccer fields on its south end.