State Highway 78 is a New Zealand State Highway connecting central Timaru with its port. It holds the record for New Zealand's shortest state highway, with a length of just over 900 metres (3,000 ft).

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State Highway 78
Map of State Highway 78
Route information
Maintained by NZ Transport Agency
Length	0.9 km (0.56 mi; 3,000 ft)
Major junctions
West end	SH 1 at Timaru (cnr Theodosia Street & Sefton Street East)
East end	Port of Timaru (cnr Port Loop Road & Marine Parade)
Location
Country	New Zealand
Highway system
New Zealand state highways Motorways and expressways List
← SH 77 → SH 79

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State Highway 78 begins at State Highway 1 just north of the CBD. It follows Sefton Street East for 200 metres (660 ft) to Stafford Street, where it becomes Port Loop Road. The road then proceeds northeast over the South Island Main Trunk Railway, before turning anticlockwise around a loop, passing under itself parallel to the railway line. The highway terminates at the intersection of Port Loop Road with Marine Parade. It is believed to be the only State Highway that crosses itself (not counting motorway on/offramps).^[1]

• List of New Zealand state highways