Bitumenised in the 1930s,[2] a 7.6-metre (25 ft) setback rule was suggested in 1939 by the Perth City Council.

[5] The central median strip had been lined with trees,[6] but they were removed and replaced with rose bushes sometime after May 1949.

[7] The Edith Dircksey Cowan Memorial to Edith Cowan, the first female member of an Australian Parliament,[8] stands on the roundabout at the junction of Kings Park Road, Malcolm Street and Fraser Avenue in West Perth.

Before the 1950s, this place used to be the intersection of Kings Park Road, Fraser Avenue, and Mount Street.

[9] The committee became aware of the Perth City Council's plans for a memorial on the Kings Park Road Circus, and when approached they agreed with the memorial being designed by Harold Boas and Henry Attwell, featuring a bronze relief designed by Margaret Johnson, with a wreath of gum leaves and nuts.