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A40 Western Avenue bridges replacement, London

A40 Western Avenue bridges replacement, London
Project Information
  • Client: Transport for London
  • Principal architect: Grimshaw
  • Principal engineer: Hyder Consulting
  • Principal contractor: Carillion
  • Contract value: £45.8 million

About the project

Built in the late 1920s, these bridges in west London weren’t designed to manage the volume of traffic on today’s A40, a very busy commuter route. They needed to be replaced without interrupting that traffic or affecting the railway below, which handles all networks into Paddington station.

The solution was based on erecting parts of the new structures in sequence, while proceeding with demolition. The bridge foundations were designed as large caisson structures, set back sufficiently to allow daytime working on the railway lines, and the use of simple, stable components enabled rapid installation while also allowing work to cease whenever necessary. As a result of public feedback, the project also included a state-of-the-art new footbridge, improving both accessibility and the streetscape.

Completing this project safely, and with minimum disruption, depended on careful design and close cooperation with every stakeholder. Its success is a model for the delivery of major works.

Judges' comment

"A highly organised upgrade project which kept traffic flowing throughout."

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