An elderly motorist in Adelaide accidentally drove onto the O-Bahn busway, causing temporary interruptions in service.Despite numerous warning signs, the Hyundai Getz driver drove onto the bus-only tracks near the Tea Tree Plaza interchange.The incident resulted in delays for city-bound buses, but services continued while the car was removed.This is not the first time a vehicle has driven onto the O-Bahn, with a counter tracking the occurrences.