This is due to planned maintenance work scheduled to take place.
The closures, affecting both the QEII Bridge and the two tunnels, will take place from Friday, February 20, 2026, to Monday, February 23, 2026.
The Dartford Crossing, part of the M25, is a key route for drivers connecting Kent, Essex, and the wider south-east of England.
National Highways is asking drivers to look at live traffic updates before going on their journey, to carefully follow diversions, and to plan for more travel time during the closures.
The following itinerary breaks down the specifics of the closures drivers should be aware of:
February 20 (Friday):
Northbound, the Dartford Crossing West Tunnel, will be closed overnight from 9pm until 5.30am on Saturday, February 21.
Similarly, the northbound Junction 1A entry slip road will experience closure from 9pm until 5.30am the next morning.
Meanwhile, the southbound A282 from Junction 1A to Junction 2 will experience a carriageway and lane closure for technology works from 11pm to 6am, with a diversion in place via National Highways.
February 21 (Saturday):
The northbound Dartford Crossing West Tunnel will once again be closed overnight for maintenance works. This closure will be active from 10pm on Saturday night until 5am on Sunday, February 22.
February 22 (Sunday):
Overnight, the northbound Dartford Crossing East Tunnel will be closed, with no access over the Dartford Crossing for vehicles over 4.8m.
The closure commences at 10.30pm and will be lifted at 5.30am on Monday, February 23. A diversion via the National Highways network will be implemented for the duration of the closure.
The temporary closures are expected to create a more peaceful period for this crucial stretch of the M25, which connects Kent, Essex, and the broader south-east region.
The closures are essential to maintain and keep smooth the daily transit flow of thousands of motorists who rely on the Dartford Crossing.
Motorists should plan ahead and, where possible, arrange for alternative routes to avoid any disruptions these closures might cause to their journeys.
By checking for live travel updates, drivers can stay informed about the real-time status of the Dartford Crossing and plan their routes accordingly to minimise inconvenience.
Motorists are reminded that there will be no access over the Dartford Crossing for vehicles over 4.8m during this closure, and a diversion will be in place via the National Highways Network.
Motorists are urged to check the status of the Dartford Tunnel before starting their journey.
