A tale of two bridges

Each day, London's A40 roadway enables more than 100,000 vehicles--and more than 800 trains carrying approximately 145,000 passengers--to travel through the city. In recent years, two of the A40's bridges deteriorated to the point of serious disrepair. In October 2005, the Transport for London, the roadway's governing body, launched a project to repair these two existing bridges without interrupting services to the 18-hour-a-day North London Line and the 24/7 Heathrow Express. This article profiles this project's evolution, an effort managed and implemented by Hyder Consulting. In doing so, it overviews the project's challenges, which involved estimating the costs and feasibility of building new structures or repairing the existing bridges. It describes the critical factor that shaped Hyder's approach to designing and constructing the repairs; it discusses the precautions the project team had to integrate into the construction effort. It then explains how Hyder managed stakeholders and addressed public concer
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