Thomas Road

Road in Perth, Western Australia

Thomas Road Western Australia

Intersection of Rockingham Road and Thomas Road

General information
Type	Road
Length	23 km (14 mi)
Opened	1950s
Route number(s)	State Route 21
Major junctions
West end	Rockingham Road (National Route 1), Kwinana Beach
	Kwinana Freeway (State Route 2) Nicholson Road (State Route 31) Tonkin Highway (State Route 4)
East end	South Western Highway (State Route 20), Byford
Location(s)
Major suburbs	Kwinana Beach, Casuarina, Oakford

Thomas Road is a major west–east road in the far southern suburbs of Perth, Western Australia, connecting Rockingham Road (part of Highway 1) in Kwinana's industrial area with Kwinana's urban area, before bridging Perth's agricultural fringe to meet the South Western Highway in Byford, just south of Armadale.^[1] Thomas Road was the terminus of the Kwinana Freeway from 1993 until 2002, and presently serves as the terminus of Tonkin Highway after its extension beyond Albany Highway in 2003.

Thomas Road forms the entirety of State Route 21.^[2]

Major intersections

LGA	Location	km	mi	Destinations	Notes
Kwinana	Kwinana Beach–Medina boundary	0.0	0.0	Rockingham Road (National Route 1) – Fremantle, Spearwood, Rockingham, Mandurah	Western terminus at signalised T-intersection
	Postans–Orelia–Medina tripoint	2.2	1.4	Gilmore Avenue – Kwinana Town Centre, Leda, Rockingham	Signalised T-intersection
	Bertram–The Spectacles boundary	6.0	3.7	McDowell Lane north/Johnson Road south – Wellard	McDowell Lane is a give way LILO intersection. Johnson Road a signalised T-intersection
	Anketell–Casuarina–The Spectacles–Bertram quadripoint	6.1– 6.3	3.8– 3.9	Kwinana Freeway (State Route 2) – Joondalup, Perth, Mandurah, Bunbury	Signalised diamond interchange
Serpentine-Jarrahdale	Oakford	13.3	8.3	Anketell Road – Wandi, Anketell, Aubin Grove	Unsignalised T-interection
		14.2	8.8	Nicholson Road (State Route 31) – Cannington, Canning Vale, Harrisdale, Forrestdale	Being converted to roundabout.
		16.9	10.5	Kargotich Road – Oldbury, Mundijong, Mardella	Being converted to roundabout.
		18.5	11.5	Tonkin Highway (State Route 4) – Muchea, Welshpool, Gosnells, Perth Airport	Signalised T-intersection.
	Byford–Darling Downs boundary	22.4	13.9	South Western Highway (State Route 20) – Armadale, Pinjarra, Bunbury	Eastern terminus at signalised T-intersection.
Incomplete access

References

^ 2011 UBD Perth and Surrounds Street Directory. Australia: Universal Publishers Pty Ltd. 2011. pp. 409–412, 426–429. ISBN 978 0 7319 2653 4.
^ Distance book (12 ed.). Main Roads Western Australia. 2012. pp. 4–5. ISBN 0 7309 7657 2. Archived from the original on 24 October 2012. Retrieved 3 January 2014.