The driver of a Park City bus is suspected of driving under the influence after the bus went off the road Saturday morning. Only the driver and a passenger were on board, and neither one was injured according to Summit County officials. The incident happened around 8am on Homestead Road between Jeremy Ranch and Pinebrook subdivisions. Summit County Lt. Andrew Wright says investigators believe the accident was "100 percent driver error." Wright says the driver told officers on the scene that he fell asleep behind the wheel, but upon further investigation, the driver admitted he had been drinking the night before. Wright did not name the driver, but said he was a 43 year old man from Coalville.