RM Williams Way

RM Williams Way South Australia
RM Williams Way road sign at Orroroo
Coordinates	(South end) (North end)
General information
Type	Rural road
Length	214 km (133 mi)
Route number(s)	B80 (1998–present) Concurrencies: RM Williams Way (Jamestown–Mannanarie) Wilmington–Ucolta Road (Black Rock–Orroroo)
Former route number	File:Australian national route 83.svg National Route 83 (1955–1998)
Major junctions
South end	File:AUS Alphanumeric Route B82.svg Horrocks Highway Bungaree, South Australia
	File:AUS Alphanumeric Route B64.svg Goyder Highway File:AUS Alphanumeric Route B78.svg Wilkins Highway Beniah Road Wilmington–Ucolta Road
North end	File:AUS Alphanumeric Route B83.svg Flinders Ranges Way Hawker, South Australia
Location(s)
Region	Yorke and Mid North
Major settlements	Spalding, Jamestown, Orroroo, Carrieton

RM Williams Way (route B80) is a road through the Yorke and Mid North region of South Australia connecting Clare in the south through Spalding, Jamestown and Orroroo to Hawker in the Flinders Ranges. The road was named after R. M. Williams who had a strong association with the countryside through which it runs.

Route

RM Williams Way branches from the Horrocks Highway (Main North Road) in Bungaree, about 13 km north of Clare. It runs roughly north to Spalding where it run concurrent with Goyder Highway for about 4 km as it continues north to Jamestown then Orroroo. It ends at the junction with the Flinders Ranges Way about 10 km out of Hawker.

The route runs in the same direction as the northern Mount Lofty Ranges and southern Flinders Ranges, but the climate changes over its length, becoming drier in the north, so the dominant agriculture and vegetation changes from more intensive farming, vineyards and grain crops in the south to pastoral grazing in the north.

Major junctions

LGA	Location	km	mi	Destinations	Notes
Clare and Gilbert Valleys	Bungaree	0	0.0	File:AUS Alphanumeric Route B82.svg Horrocks Highway (B82) – Clare	Southern terminus of road and route B80
Northern Areas	Spalding	25	16	File:AUS Alphanumeric Route B64.svg Goyder Highway (B64 east) – Burra	Concurrency with route B64
		26	16	File:AUS Alphanumeric Route B64.svg Goyder Highway (B64 west) – Gulnare, Crystal Brook
	Jamestown	60	37	Wilkins Highway (B79 west) – Gladstone, Crystal Brook File:AUS Alphanumeric Route B78.svg Wilkins Highway (B78 east) – Hallett	Concurrency with route B79
	Mannanarie	78	48	Beniah Road (B79 east) – Yongala, Peterborough
Orroroo Carrieton	Black Rock	105	65	Wilmington–Ucolta Road (B56 east) – Peterborough	Concurrency with route B56
	Orroroo	117	73	Wilmington–Ucolta Road (B56 west) – Wilmington
Flinders Ranges	Hawker	214	133	File:AUS Alphanumeric Route B83.svg Flinders Ranges Way (B83) – Hawker, Quorn	Northern terminus of road and route B80 10km south of Hawker
Concurrency terminus       Route transition