Grand Junction Road is the longest east-west thoroughfare in the Adelaide metropolitan area, and is located approximately 9 kilometres north of the city centre. Travelling from the Port Adelaide region, it is mostly a double lane sealed road (becoming a single lane road past Tolley Road intersection at Hope Valley, South Australia) running 21 kilometres to the base of the Adelaide Hills. The western terminus is at the intersection of Old Port Road, 300 metres east of a causeway, which separates the Port River from West Lakes. The 2.4 kilometre section of road that continues west of Old Port Road to Semaphore South is named Bower Road. The eastern terminus of Grand Junction Road is in the suburb of Hope Valley, at the intersection of Hancock Road and Lower North East Road, just before the l