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The A3 bypass at Hindhead was constructed to improve road safety, reduce congestion and improve air quality. Running beneath Devil’s Punch Bowl, a site of Special Scientific Interest, the new dual carriageway includes the longest non-estuary underpass in the UK – 1.83km of twin bored tunnels.
With traffic congestion now absent, the existing road south has been downgraded to a local distributor road, while the northern carriageway has been closed and restored to heathland, as it was a century ago.
The Highways Agency commissioned Atkins for design, geotechnical advice, site supervision, tender and contract documentation, noise and air quality assessments, and expert witness services.