New charges to use the Dartford Crossing will come into force on October 7.
The extra cash raised will help deliver a package of extensive improvements to tackle congestion and improve journey times for road users at the crossing including the introduction of free-flow electronic charging.
From next months cash payments at the crossing will increase from £1.50 to £2.00 for cars, from £2.00 to £2.50 for 2 axle goods vehicles, and from £3.70 to £5.00 for heavy goods vehicles.
The crossing will remain free for motorcyclists and discounts will continue for local residents and DART-Tag account holders who pay in advance. Any vehicle using the crossing between 10pm and 6am can continue to do so for free.
Roads Minister Mike Penning said: “The Dartford-Thurrock River Crossing is a vital piece of transport infrastructure, but upgrades need to be made. To do that, we need to start planning now for the future.
“That’s why we are introducing free-flow charging by the autumn 2014 and currently analysing the options for a new crossing in the Lower Thames area.
“We have listened carefully to what people have said, which is why charges that were meant to be implemented towards the end of last year have been delayed until now.
"The money raised will help us prioritise investment for much needed improvements to increase capacity and reduce journey times.”