Shay Murtagh Precast » FAQs » Precast Concrete » What is the longest road tunnel in the UK? What is the longest road tunnel in the UK? The longest road tunnel in the UK is the A3 Hindhead Tunnel at 1.2 miles, which is between London and Portsmouth. Related FAQs What are interlocking concrete blocks? How do you reinforce soil? How retaining walls work? What are prefabricated wall panels?
