Construct - Issue 49

Project

MANAGINGCOMPLEXPROGRAMME CONSTRAINTSWAS KEY TO BOOSTINGCAPACITYATAN IMPORTANT LONDON INTERCHANGE MAKING SPACE

LOCATION

Tolworth roundabout is a busy interchange in southwest London where the A3 trunk road meets the A240 and the main roads into Kingston and Surbiton. The A3 runs below the roundabout, with slip roads taking the traffic between the levels, while pedestrians and cyclists can cross via a path and bridge through the middle of the roundabout. It has always been a busy junction, but traffic levels are set to rise significantly with the construction of the Signal Park housing development on the southwest edge of the roundabout and a new HQ for supermarket giant Lidl further south. “We recognised that we would need to do something to mitigate this increased traffic, particularly the impact it would have on bus operations,” says Stuart Eastmond, project manager for Transport for London (TfL), which manages London’s traffic network. “Our modelling showed that buses in the area could be significantly delayed during the morning and afternoon peak periods if we didn’t act.” TfL aims to prioritise public transport and active travel but recognised that, in this case, it would need to create additional

capacity for road traffic by adding an extra lane to the northbound side of Kingston Road and remodelling the roundabout. However, TfL also saw the project as an opportunity to upgrade the area for pedestrians and cyclists, encourage biodiversity and manage flood risk from surface water run-off.

Wimbledon

Kingston upon Thames

Bushy Park

A3

Surbiton

River Thames PROJECT LOCATION

A309

Chessington

A240

Epsom

Initial design started in 2017, with FM Conway appointed as contractor under

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