By sdelaney@thekmgroup.co.uk (Sean Delaney) The cost of building the country’s longest road tunnel to ease congestion on the Dartford Crossing has risen by nearly £2bn over the last two years. A revised bid to build the Lower Thames Crossing connecting Kent and Essex via a new 14.3 mile road was resubmitted last month. It includes two 2.6-mile road tunnels under the Thames, which will be the longest road tunnels in England. The project requires changes to the current road network and requires approval from the government in the form of a development consent order (DCO). National Highways says …
