The spill, which occurred on October 21 during essential maintenance on one of the northbound tunnels, led to the closure of the east tunnel as around 400 meters of road required resurfacing.
That meant capacity for northbound traffic was reduced by 50 per cent and drivers were advised to avoid the area as significant disruption lasted into the evening.
Despite the disruption, overnight closures are still planned for the last week in October, according to the National Highways website.
Running through to Monday, October 29, both the anticlockwise and northbound tunnels will experience closures during late hours, with diversions in place via National Highways roads.
The Dartford Crossing, previously known as the Dartford Tunnel until 1991, is a major road crossing over the River Thames in England.
It connects Dartford in Kent (south) to Thurrock in Essex (north) via the A282 road.
This information is accurate at the time of publication, but may be subject to change, particularly in adverse weather conditions.
Tuesday, October 22 – Wednesday, October 23
• A282 Anticlockwise Jct 1A entry slip road closure
• A282 Anticlockwise Jct 1A to M25 Anticlockwise Jct 31
West Tunnel closure for grillage works 10pm – 5.30am
Diversion via National Highways roads
Wednesday, October 23 – Thursday, October 24
• A282 Anticlockwise Jct 1A entry slip road closure
• A282 Anticlockwise Jct 1A to M25 Anticlockwise Jct 31
West Tunnel closure for grillage works 10pm – 5.30am
Diversion via National Highways roads
Thursday, October 24 – Friday, October 25
• A282 Anticlockwise Jct 1A entry slip road closure
• A282 Anticlockwise Jct 1A to M25 Anticlockwise Jct 31
West Tunnel closure for grillage works 10pm – 5.30am
Diversion via National Highways roads
Friday, October 26 – Saturday, October 27
• A282 Anticlockwise Jct 1A entry slip road closure
• A282 Anticlockwise Jct 1A to M25 Anticlockwise Jct 31
West Tunnel closure for grillage works 11pm – 6am
Diversion via National Highways roads
Saturday, October 27 – Sunday, October 28
A282-Northbound
A282 Northbound Dartford Crossing West Tunnel closure
Tunnel closure for maintenance works 10pm – 5am
Diversion via National Highways network
Sunday, October 28 – Monday, October 29
A282-Northbound
A282 Northbound Dartford Crossing East Tunnel closure
Tunnel closure for maintenance works 10pm – 5am
Diversion via National Highways network
