Auckland Harbour Bridge

Auckland Harbour Bridge
Auckland Harbour Bridge, seen from the North Shore looking toward Auckland City (2024).
Coordinates36°49′46″S 174°44′47″E / 36.82944°S 174.74639°E / -36.82944; 174.74639
Carries
CrossesWaitematā Harbour
LocaleAuckland, New Zealand
BeginsWesthaven
EndsNorthcote Point
Maintained byNZ Transport Agency Waka Kotahi
Characteristics
Designoriginal superstructure: clip-ons:
Trough constructionSteel
Pier constructionConcrete
Total length1,020 metres (3,350 ft)
Width
  • 35.4 metres (116.1 ft)
    • Original superstructure
      • 13.4 metres
    • Clip-ons
      • 11 metres (2 ×)
Height64 metres (210 ft) from arch truss top to water
Longest span243.8 metres (800 ft)
No. of spans9
Piers in water6
Load limitClip-ons: 13.0 tonnes (28,700 lb)
Clearance aboveInner lanes: 4.8 metres (16 ft)
Clearance below43 metres (141 ft) at high tide
No. of lanes
  • Total: 8
  • • Original: 4
  • • Clip-ons: 4
History
DesignerFreeman Fox & Partners
Constructed byoriginal superstructure: clip-ons:
Construction startoriginal superstructure:
  • • 1954 (1954)
clip-ons:
• 1967 (1967)
Construction endoriginal superstructure:
  • • April 1954 (1954-04)
clip-ons:
• September 1969 (1969-09)
Construction costoriginal superstructure:
   £7,516,000 (1959 value)
Openedoriginal superstructure:
  • • 30 May 1959 (30 May 1959)
clip-ons:
  • • 22 September 1969 (22 September 1969)
Statistics
Daily traffic
  • Average: 170,000 (2022)
  • Peak: 200,000 (2022)
TollNone (since 31 March 1984)
Location

The Auckland Harbour Bridge is an eight-lane motorway bridge over Waitematā Harbour in Auckland, New Zealand. It joins St Marys Bay on the Auckland city side with Northcote on the North Shore side. It is part of State Highway 1 and the Auckland Northern Motorway. The bridge is operated by the NZ Transport Agency Waka Kotahi (NZTA). It is the second-longest road bridge in New Zealand, and the longest in the North Island.

The original inner four lanes, opened in 1959, are of box truss construction. Two lanes were added to each side in 1968–1969 and are of orthotropic box structure construction extend as cantilevers from the original piers. The bridge is 1,020 m (3,348 ft) long, with a main span of 243.8 metres (800 feet) rising 43.27 metres (142 feet) above high water, allowing ships access to the deepwater wharf at the Chelsea Sugar Refinery, one of the few such wharves west of the bridge.

While often considered an Auckland icon, many see the construction of the bridge without walking, cycling, or rail facilities as an oversight. In 2016, an add-on structure providing a walk-and-cycleway called SkyPath received Council funding approval and planning consent, but was not built. In 2021, a stand-alone walking and cycling bridge called the Northern Pathway was announced by the New Zealand Government, but also was not built.

About 170,000 vehicles cross the bridge each day (as of 2019), including over 1,000 buses, which carry 38% of all people crossing during the morning peak.