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Queensferry Crossing is the world’s longest three-span cable-stayed bridge and provides a vital transport link over the Forth estuary. Working in consortium, HOCHTIEF delivered the 2.7km road bridge, which features three towers, two approach viaducts and a two-lane motorway with hard shoulders, as well as associated road connections to the north and south of the estuary.

Key features:

  • 2.7km three-span cable-stayed bridge: 3 towers, 2 approach viaducts
  • 2 lane motorway
  • 5km dual three-lane carriageway
  • Junction upgrades
  • 150,000t of structural concrete
  • 30,000t of steel
  • 23,000 miles of cabling
  • Earthworks
  • Utilities diversions

We consulted extensively with stakeholders, including 47 statutory bodies, during design of the connecting roads to ensure that we addressed their needs. The new road network combines the use of Intelligent Transport System (ITS) technology with junction improvements to improve safety, traffic flows and reduce congestion.

During construction, we used water-borne transport for material deliveries and maintained two lanes of traffic in each direction on the main approach roads to minimise disruption.

We installed a pioneering windshield system on the bridge, which will protect traffic and prevent road closures during high winds, while the steel strands within the bridges cables can be easily replaced individually during normal maintenance, saving costs and avoiding road closures. We also used thick road surfacing with a long life and laid it in echelon formation to remove longitudinal joints, reducing maintenance requirements.

The scheme won several awards, including CEEQUAL Excellent, Considerate Constructors Scheme Gold from 2013 – 2017, a Green Apple Award 2014 and a GO (Government Opportunity) Award, which celebrates excellence and innovation in procurement. Queensferry Crossing opened to traffic in August 2017.