£8.3bn Lower Thames Crossing to Ease Congestion and Boost Connectivity

A groundbreaking infrastructure project has been given the go-ahead, with the UK set to construct its longest-ever road tunnel as part of the £8.3bn Lower Thames Crossing development.

Transport Secretary Heidi Alexander has granted approval for National Highways’ application to build a 14.5-mile road connecting Kent and Essex. This major project, described as the most significant road initiative in decades, includes a 2.6-mile tunnel beneath the River Thames.

Designed to relieve congestion on the Dartford Crossing, the new motorway-style road will nearly double capacity for crossings east of London, linking the A2 and M2 in Kent with the A13 and M25 in Essex. The initiative has been in planning since 2009, with over £800m already spent on development.

National Highways stated that private finance options are being explored, with estimates suggesting the total cost could rise to £10bn. Construction is expected to begin next year, with the road anticipated to open in the early 2030s.

Matt Palmer, Executive Director of the Lower Thames Crossing at National Highways, emphasised the project’s benefits, highlighting its role in supporting economic growth, improving travel efficiency, and setting a new standard for sustainable construction.

While the decision has been welcomed by businesses and industry leaders, some local authorities and campaign groups have voiced concerns over its environmental and social impact. Critics argue that the project could cause significant disruption and question whether the funding would be better allocated elsewhere.

Despite opposition, the government remains committed to the project, positioning it as a key infrastructure investment to enhance connectivity between the South and the Midlands, facilitate trade, and support regional economic growth.