Freeways, highways, and arterial roads in Perth, Western Australia form the basis of the road network inside the Perth Metropolitan Region.
[3][4] The remaining roads are the responsibility of local governments;[2] major roads provide links to various destinations within Perth Metropolitan Region.
[8][9] National Highways and National Routes are road routes of national significance, whilst State Routes in Perth are allocated to the main routes connecting its urban centres.
[8] Additionally, roads through areas of scenic or historic significance are designated as part of a Tourist Drive.
[8][9] Each route has a unique marker: National Highways have gold numbers on a green shield, National Routes have black numbers on a white shield, State Routes have white numbers on a blue shield, Tourist Drives have white numbers on a brown shield.