Dunedin Southern Motorway

Dunedin Southern Motorway
State Highway 1
Dunedin Northern and Southern Motorways (marked in red - other parts of State Highway 1 are marked in white)
Route information
Maintained by NZ Transport Agency
Length:	13 km (8 mi)
Existed:	1972 – present
Major junctions
Northeast end:	Lookout Point, Dunedin
	State Highway 87
Southwest end:	Mosgiel
Location
Primary destinations:	Dunedin, Green Island, Fairfield, Mosgiel
Highway system
New Zealand state highways Motorways and expressways List Unused

The Dunedin Southern Motorway is the main arterial route south from the South Island city of Dunedin, part of New Zealand's State Highway 1. It is one of the world's southernmost motorways.

SH1 traverses Dunedin as two multiple-lane one-way streets, travelling past the University of Otago and the CBD before rejoining as a single multiple-lane road at the Andersons Bay intersection; a busy signal-controlled "T" intersection with SH1 and Andersons Bay Road in South Dunedin.

From the intersection SH1 becomes a four lane median-divided road through to the Barnes Dr intersection, crossing King Edward Street (South Dunedin's main street) on twin over-bridges at Kensington, and twin over-bridges near the Glen, crossing South Road just north of Carisbrook. While this section meets most technical definitions of a motorway with full limited access including no pedestrian or cycle traffic, it is not designated a motorway by the NZ Transport Agency due to its short length.

SH1 continues south as a four-lane limited-access road past Carisbrook and Caversham. The Main South Line parallels SH1 along the east side of the road. Known as the Caversham bypass, this section SH1 is subject to congestion during the morning and afternoon weekday peaks.