| State Highway 16 | ||||
|---|---|---|---|---|
| Twin Coast Discovery Highway | ||||
| Route information | ||||
| Maintained by New Zealand Transport Agency | ||||
| Length: | 108 km (67 mi) | |||
| Tourist routes: |
Twin Coast Discovery Highway | |||
| Major junctions | ||||
| Southeast end: | Port of Auckland | |||
| Northwest end: | SH 1 at Wellsford | |||
| Location | ||||
| Primary destinations: |
Auckland City, Waitakere, Helensville | |||
| Highway system | ||||
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New Zealand State Highways
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State Highway 16 (SH 16) is a New Zealand state highway linking Auckland City with Wellsford, via Auckland's Northwestern Motorway, Helensville and Kaukapakapa. It provides an alternative to State Highway 1 for traffic travelling between Auckland and parts of Northland from Wellsford northwards.
Within the Auckland metropolitan area, SH 16 mostly runs along the Northwestern Motorway, the major exception being the first 2 km between the Port of Auckland and the Central Motorway Junction. Outside the Auckland metropolitan area, SH 16 is single carriageway with at-grade intersections.
| Territorial authority | Location | km | Destinations | Notes |
|---|---|---|---|---|
| Auckland City | Port of Auckland | 0 | Quay Street/Tamaki Drive | SH 16 begins |
| Auckland CBD | 1 | SH 16 becomes Northwestern Motorway | ||
| 2 | SH 1/Thermal Explorer Highway South Southern Motorway Manukau, Hamilton |
Westbound exit and eastbound entrance | ||
| 3 | SH 1/Twin Coast Discovery Hwy North Northern Motorway North Shore, Whangarei |
Westbound exit and eastbound entrance | ||
| 4 | SH 1/Thermal Explorer Highway South Southern Motorway Manukau, Hamilton |
Eastbound exit and westbound entrance | ||
| SH 1/Twin Coast Discovery Hwy North Northern Motorway North Shore, Whangarei |
Eastbound exit and westbound entrance SH 16/Twin Coast Discovery Highway concurrency begins |
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| Waitakere City | Westgate | 19 | SH 18 Hobsonville Road North Shore |
Northwestern Motorway ends |
| Rodney District | Wellsford | 108 | SH 1/Twin Coast Discovery Hwy North Whangarei, Kaitaia |
SH 16 ends |
| SH 1/Thermal Explorer Highway South Warkworth, Auckland |
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