Statistics:

Length:
266 km
Termini:
Eastern: Sturt Hwy (A20), Monash
Western: Augusta Highway (A1), Crystal Brook
Suburbs, Towns & Localities Along Route:
Crystal Brook, Narridy, Gulnare, Spalding, Burra, Maude, Morgan, Taylorville, Devlins Pound, Overland Corner and Monash

Route Numbering:

Current: B64
Multiplexed with: A32 B80 B82
Former: 1 1 64
Road Authority Internal Classification: 1
03160 (Gulnare)
03400 (Burra to Mt Bryan)
03497 (Crystal Brook)
03498 (Gulare to Crystal Brook)
03583 (Spalding to Gulnare)
03692 (Mt Bryan to Spalding)
07100 (Monash to Burra)
36839 (Burra)

General Information:

B64 connects Monash, near the SA-Vic border town of Renmark to Crystal Brook and A1, acting as a by-pass route of greater Adelaide and other town centres south of the route. The route is entirely rural road / rural highway standard, consisting mostly of one lane in each direction. The route crosses the Mount Lofty Ranges.

Multiplexes along the route include:
A32 (Barrier Hwy), for 7 km, Burra
B80 (RM Williams Way (formerly Clare-Peterborough Road)), for 4 km, Spalding.
B82 (Horrocks Hwy (formerly Main North Road)), for 2 km, Gulnare.

History:

1990s: Crystal Brook bypassed, with National Highway 1 rerouted on what is now Augusta Hwy (A1), creating Old Princes Hwy, now part of Goyder Highway.
1996 to 1999: First time sealing of the route between Burra and Morgan. 2
1998: NR64 replaced by B64.
1 SA Government, Location SA Map Viewer.
2 SA Government, South Australian Parliament.