Stirling railway station is a Transperth rail and bus interchange located northwest of Perth railway station in Western Australia, on the Joondalup Line.HistoryConstructed from 1990 to 1992, the station it was built as part of the Northern Suburbs Transit System and the Joondalup Line.Traffic issuesThe station's location presented some interesting design challenges - while the station resides within the Mitchell Freeway road reserve, the road reserve for the future Stephenson Highway runs in an area directly over the station at the southern end of its platforms. During the design of the station and its approach roads, the engineering firm Ove Arup & Partners was tasked with investigating and designing road layouts to accommodate for both future and current needs.Due to the nature of the future Stephenson Highway, a number of road layout options were considered including: Original designs first proposed for the freeway by the Main Roads Department, consisting of a diamond interchange between Scarborough Beach Road and Stephenson Highway, and link of existing Oswald Street (later known as Ellen Stirling Boulevard), Osborne Park.As per the above option, but without the Osborne Park link.As per the above option, but without the link of Oswald Street between Scarborough Beach Road and Cedric Street (an option recommended by station designers Hames Sharley architects).A design only known as the Forbes and Fitzhardinge planning scheme, of which no information or design drawings exist within the engineers' report. All of the above designs involved significantly complex road layouts which amongst others included partial cloverleaf interchanges, and the construction of new bridges connecting the future highway to Cedric Street.