_02.jpg) Southern entrance to the Sydney Harbour Tunnel, northbound | |
| Overview | |
|---|---|
| Location | Port Jackson |
| Coordinates | 33°51′09″S 151°12′43″E / 33.85260°S 151.21187°E |
| Status | Active |
| Route |  |
| Start |  Warringah Freeway |
| End | Cahill Expressway |
| Operation | |
| Work begun | February 1988 |
| Opened | 30 August 1992 |
| Owner | Transport for NSW |
| Operator | Ventia |
| Traffic | Automotive |
| Toll | Time of day tolling (southbound only) |
| Vehicles per day | 96,000 (2017) |
| Technical | |
| Length | 2.8 km (1.7 mi) |
| No. of lanes | 4 |
| Operating speed | 80 km/h (50 mph) |
| Tunnel clearance | 4.4 m (14 ft 5 in) vehicle clearance, |
| Width | 10.5 m (34 ft 5 in)[1] |
| Depth of tunnel below water level | 25 metres (82 ft) |
| Depth of shipping channel above | 16 m (52 ft)[1] |
The Sydney Harbour Tunnel is a twin-tube road tunnel in Sydney, Australia. The tunnel was completed and opened to traffic in August 1992 to provide a second vehicular crossing of Sydney Harbour to alleviate congestion on the Sydney Harbour Bridge. It is one of two transportation tunnels under the harbour, the other being a set of rail tunnels for the Sydney Metro.[2][3]
The tunnel joins the Warringah Freeway at North Sydney and the Cahill Expressway at the entrance to the Domain Tunnel. It has two lanes in each direction, and runs at an angle of approximately thirty degrees (north to south) to the Sydney Harbour Bridge, which has eight lanes, with a tidal flow operation. In 2017, the tunnel was carrying around 96,000 vehicles per day.[4][5]
- ^ a b Muhammad, Imran; Low, Nicholas (December 2006). Mega Projects in Transport and Development: Background in Australian Case Studies Archived 2 July 2009 at the Wayback Machine. Australasian Centre for the Governance and Management of Urban Transport. Retrieved 3 July 2009.
- ^ "Planning approval for Sydney Metro under the Harbour". Sydney Metro. New South Wales Government. 10 January 2017. Archived from the original on 18 January 2017. Retrieved 18 January 2017.
- ^ McNab, Heather (11 January 2017). "Twin tunnels under Sydney Harbour given green light for metro project". The Daily Telegraph. Archived from the original on 8 March 2017. Retrieved 18 January 2017.
- ^ Western Harbur Tunnel and Warringah Freeway Upgrade Infrastructure Australia 15 April 2021
- ^ Ralston, Nick (11 December 2008). "Harbour tunnel still good value: govt". Sydney Morning Herald. Archived from the original on 24 March 2012. Retrieved 1 February 2011.