Roe Highway is a 35 kilometre limited access highway and partial freeway in the south-eastern suburbs of Perth, Western Australia, linking Middle Swan in the north-east with Bibra Lake in the south-west. It is primarily allocated State Route 3 and forms half of Perth's outer ring road along with Reid Highway, which it joins onto at its northern terminus.
The highway is one of the key heavy vehicle routes in the Perth metropolitan area. Aside from intersections, the speed limit is 100 km/h for most of its length. 20 kilometres of the highway, in between Kwinana Freeway and Tonkin Highway, is a continuous freeway, with grade-separated interchanges and free traffic flow. The rest of the highway is the standard of Perth's major highways; limited access, with few grade separations and traffic lights.