Hindhead tunnel drivethroughTen years after being let as a design/build contract, the 1.6 km-long twin tube A3 Hindhead tunnel in southeast England is set to open in summer, 2011. A ministerial drivethrough took place last week prior to the opening of the first section of bypass later this month. Overall cost is projected at EUR446 million. For project history since 2001 visit tunnelbuilder archive uk/37. 31/10.