The entire length of Orrong Road is a four lane dual-carriageway, similar to other major roads in the area such as
Albany Highway,
Welshpool Road and
Abernethy Road. Unlike those roads however, the carriageways of Orrong Road are separated by a wide tree-lined central median, giving the road more of a
boulevard appearance. The western terminus of Orrong Road is located just to the southeast of the
parclo interchange between
Graham Farmer Freeway and
Great Eastern Highway where the road transitions from a freeway to an at-grade dual carriageway. The road continues in a south-easterly direction forming the boundary between the
Town of Victoria Park's
Lathlain and the
City of Belmont's
Rivervale. The first traffic light intersection is encountered at Francisco Street. At Roberts Road the southern suburb boundary changes to
Carlisle, with the northern suburb swapping to
Kewdale just south of the signalised intersection with Archer Street (at the Sydenham Street cul-de-sac). The next signalised intersection, with Wright Street, connects Orrong Road to
Belmont Forum. The final set of lights prior to
Leach Highway is found at the intersection with Oats Street. At Briggs Street the southern suburb boundary changes to the
City of Canning's
Welshpool with the road now marking the northern limit of the Welshpool industrial area The road then intersects with Leach Highway at a
diamond interchange with Leach Highway free-flowing over Orrong Road, after which the northern side also transitions from a residential to an industrial area. The next signalised intersection with Division and Bell Street sees the road fully enter Welshpool. Two more sets of lights are encountered at Pilbara Street and Kewdale Road. After Kewdale Road the road curves to the east and runs parallel with
Welshpool Road to the south. The two roads eventually connect to each other via a signalised intersection with McDowell Street as a proxy for Welshpool Road. Orrong Road's eastern terminus is at the diamond interchange with Roe Highway. As with Leach Highway, Roe Highway is also free-flowing over Orrong Road, which continues as
Welshpool Road East from this point. ==History==