It's a route used by more than a hundred thousand drivers a day. The Dartford Crossing is one of the biggest pinch-points for the south-east road network. Today the Government said it will do a detailed study of two final options for a new crossing over the Thames.
But some debate whether it's needed. David Johns reports, speaking to Roads Minister Robert Goodwill and Thurrock Council leader John Kent (Lab).
It's a debate that's divided opinion in Berkshire and Oxfordshire for more than 50 years and it's been re-ignited following the recent bad weather. Should there be a third bridge over the River Thames in Reading to ease traffic congestion?
There's support for the plan in Reading but as Mel Bloor reports, people across the border in South Oxfordshire aren't so convinced.
Interviewees: Petition creator Adele Harbor, Cllr Keith Baker from Wokingham Borough Council and Reading East MP Rob Wilson.
The environmental watchdog Protect Kent has reacted to the news that Swanscombe has been ruled out as a potential location for a new Thames Crossing.
Richard Knox-Johnston from the organisation said that while one option had been taken off the table, questions remained about the two other potential locations.