South Western Highway (State Route 20)
The South Western Highway was once part of the main route between Perth and Bunbury, and was signed as NR1. The route runs parallel to the current NR1 alignment, but about 20 to 30 km inland.
Consisting of mainly rural highway, the route runs north-south and connects numerous small towns that sprang up with the introduction of the railway line through the area during the 1800s.
State Route 107 duplexes SR20 from Burekup to Bunbury. State Route 22 duplexes SR20 for about 200 metres in Mundijong.
1 Main Roads Western Australia
2 A Department of Infrastructure and Planning
Last updated: 19-Jan-2019 16:22
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