- 2 updates
The Highways Agency said that the full benefit of the changes will only be felt when the toll booths are removed.
Dart Charge Project Director Nigel Gray said: "We will get underway on this work at the same time that the new payment arrangements begin. It's complicated work - especially on the northbound carriageway, where we need to protect the tunnels - one of which was built in the 1960s and has a lower height restriction - from over-height vehicles.
"We’ll be completely redesigning the approach to the tunnels to detect and turn around these vehicles and other vehicles not suitable for the tunnels, using a system of signals, barriers and extra lanes, while keeping all other traffic flowing as much as possible.”
The Highways Agency has released images of how the Dartford Crossing will look when the toll booths are removed.
The current 27-lane system will be removed by four open lanes in each direction.
Work to remove the toll booths will coincide with Dart Charge - a remote charging system - going live in late November. The scheme is expected to be complete by next spring.