South Western Highway in Mardella

South Western Highway in Shire of Serpentine-Jarrahdale is a two-lane, asphalted expressway (110 km/h, road number 22;206). It runs in a north-south direction and crosses Walters Road, Wilaring Street, Stanley Road, Larsen Road, Thomas Road, Nettleton Road, Abernethy Road, Blytheswood Avenue, Pitman Way, Evans Way, Park Road and Jessie Street. It connects Byford, Serpentine, Mundijong, Darling Downs, Jarrahdale and Whitby. This road is part of the long-distance roads 206 and 20.