Starting at the intersection with Princes Highway in Clayton, the road travels in a southerly direction, intersecting with Centre Road, an overpass of the Cranbourne and Pakenham railway lines and an intersection with Heatherton Road, all with a speed limit of 80 km/h. Westall Road then continues on as a semi-freeway standard road along the reservation of the Dingley Freeway with a speed limit of 80 km/h (formerly 100km/h until the Dingley Bypass was built). It continues as the Dandenong Bypass at Springvale Road and continues east to Cranbourne and Gippsland.