Essex's main roads include the A12 and M25, alongside an important section of the travel network at the Dartford Crossing. M25, Dartford Crossing and A12 closures for Friday, September 12M25An entry and exit slip road closure is due to be in place on the M25 Clockwise at Junction 29 from 11pm to 5.30am. 7 Common Speed Camera MythsM25, Dartford Crossing and A12 closures for Saturday, September 13M25There are no closures scheduled to take place on the M25 in Essex on this day. M25, Dartford Crossing and A12 closures for Sunday, September 14M25There are no closures scheduled to take place on the M25 in Essex on this day. A12There are no closures scheduled to take place on the A12 in Essex on this day.