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Hindhead Tunnel Car Interior

21st century transport corridor

The A3, a major trunk road connecting Portsmouth with London, passed through the village of Hindhead and the Devil’s Punch Bowl, a renowned beauty spot and site of special scientific interest.

This cutting-edge road scheme has surpassed expectations in almost every way, and sets a new standard for how vital infrastructure improvements can be delivered.

Philip Hammond

Transport secretary, 2011


Congestion and accidents were major problems and the flow of 30,000 vehicles a day marred the stunning landscape.


We designed a bypass and tunnel to speed vehicles past Hindhead. To detect incidents and prevent them turning into traffic snarl-ups on this strategic transport corridor, we fitted the tunnel with state-of-the-art communication and control systems, including the first radar-based detection system using six radar heads and processors in each bore to give full coverage of the tunnel.


The fine range discrimination allows for vehicles close to each other to be separately identified and the locations of the radar heads avoid ‘blind spots’ under each head. CCTV cameras provide operators with visual confirmation of traffic flow and incidents. The scheme has been a huge success, reducing congestion and pollution in Hindhead, cutting journey times between the south coast and London, while enhancing the sensitive environment in the Devil’s Punch Bowl. The scheme has increased the amenity value of this area and left a lasting legacy for surrounding communities.

Won the Major Project Award, CIHT Awards (2012)
Won the Infrastructure Award, Ace Engineering Excellence Awards (2012)

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