The line from Adelaide to Port Adelaide was the second railway in South Australia and opened in 1856. The original line from Adelaide ran directly to Port Dock station, the site now occupied by the National Railway Museum. Various lines then continued through the Port Adelaide's streets to the wharves and, from 1878, along St Vincent Street to the seaside town of Semaphore. Congestion at Port Dock railway station and the delays involved in operating trains along busy streets in the centre of the Port resulted in construction of a viaduct and a new bridge across the Port River in 1916. This diverted through trains to Semaphore and Outer Harbor via a new station named Commercial Road, the current station. Port Adelaide Commercial Road was quite a substantial building, with long platforms, an overall roof and a signal cabin. This quickly took over from Port Dock as the town's principal railway station. As rail traffic decreased through the 1960s and 70s, facilities at Commercial Road station were gradually reduced. In the early 1970s the roof was removed, platforms shortened and the street level station buildings reconstructed. The ticket officeclosed inJanuary 1979 and the station has been unstaffed since then. With the closure of Port Dock station in 1981, Commercial Road station was subsequently renamed Port Adelaide. In November 2009, the station and viaduct closed for refurbishment, reopening on 9 May 2010. Currently, Port Adelaide station's two elevated platforms are on a viaduct that carries the railway across Commercial Road. The station is unstaffed and has no buildings or other facilities except basic passenger shelters on each platform. The tracks through Port Adelaide station were dual gauge, both broad gauge and. This allowed freight traffic from Dry Creek via the Rosewater loop to access industrial facilities on the Lefevre Peninsula and the container terminal at Pelican Point. In August 2008, freight traffic was diverted to operate via the Mary Mackillop Bridge downstream of the Port Adelaide harbour. The disused standard gauge rails have been removed, however the dual gauge sleepers remain in place with the entire Outer Harbor line to be gauge converted in the future.
