Tuesday’s announcement was 16 years in the making, with the project first mooted in 2009 and more than £1.2bn in taxpayers’ money spent on planning since.
The application was submitted to the Planning Inspectorate for consideration by National Highways on 31 October 2022.
It was approved by Secretary of State for Transport Heidi Alexander on 20 March.
National Highways has planned to begin construction in 2026.
Dickson said: “For far too long governments have dodged making a decision on the Lower Thames Crossing, leaving Dartford residents to endure endless gridlock.
“This decision will unlock economic growth across the country and finally deliver a solution to the traffic chaos faced by my constituents on a daily basis.”
The BBC understands the decision on the funding model has not been made yet, but the tunnel itself and the utility works would be publicly funded, alongside significant private sector finance.
Chancellor Rachel Reeves said in January that the private sector could help “to deliver the infrastructure that our country desperately needs”.
‘Quicker, safer and more reliable’
Reacting to the announcement on X, external, James McMurdock, the South Basildon and East Thurrock MP, said congestion in Kent would remain “unresolved” despite the project.
The Reform UK MP feared miles of countryside would be “covered with tarmac” adding: “Where has our pride and ambition gone?”
Campaigners have also raised concerns about ancient woodland being impacted by the works.
Chris Todd, the director of Transport Action Network, said the decision was “absolute madness”.
He added: “The only way that the government can afford this white elephant would be to take money from all the other nations and regions in the UK.
“Rather than boosting growth, this will clog up roads in the south east and slow the economy down even more.”
However, National Highways described it as “the most significant road project in a generation”.
Executive director Matt Palmer added: “It will unlock growth with quicker, safer, and more reliable journeys.
“Our plans have been shaped by the local community and refined by robust and rigorous examination from independent experts.”
