Where it terminates in Bedford Park, southwest of Adelaide's centre, Marion Road feeds into the Southern Expressway near the northern starting point of that road.

Route A14 continues west on Henley Beach Road for about 250 metres.

It then continues north along the entire length of East Avenue until it ends at Port Road.

The crossing in close proximity to two major intersections sometimes causes congestion during peak times, and has been the subject of political attention to convert the intersection with the tram line into an overpass.

Marion Road is also the location of a stop on the Glenelg tram line.