After crossing M5 Motorway at Beverly Hills, the road narrows to a four-lane, single-carriageway road before eventually terminating at an intersection with Princes Highway at Blakehurst.

The southern end of Main Road 315 between Hurstville and Blakeville was later re-aligned to follow the entire length of King Georges Road (and terminate at Princes Highway some distance south than its previous intersection at Woniora Road) on 11 November 1964.

[7] King Georges Road was initially designated to become part of a major north–south metropolitan arterial route in 1964, when the route incorporating other existing local arterial roads from Mona Vale to Blakehurst were designated Ring Road 3.

[11] King Georges Road was allocated part of Ring Road 3 in 1964, before it was replaced with State Route 33 in 1974, then re-designated part of Metroad 3 in April 1993.

[12] With the conversion to the newer alphanumeric system in 2013, Metroad 3 was replaced by route A3.