[1] Also known as the Perth Inner Ring Road, due to its circumnavigation of the city centre, it is 1.93 miles (3.11 km) long.

Perth's city centre is around 0.5 miles (0.80 km) long and wide.

Turning north at Perth railway station it becomes Leonard Street.

Opposite Perth bus station, it turns west, becoming St Andrew Street briefly, then Caledonian Road.

[3] Finally, in the northwestern corner of the city centre, the road becomes Atholl Street again.