TQ7462 : M2, Junction 3 (Blue Bell Wood)The M2 is 25.7 miles long and acts as a bypass of the section of the A2 road which runs through the Medway Towns, Sittingbourne and Faversham. It is the only motorway in England that does not intersect with any other motorway at a junction.
Junction 23 on the M25 in Hertfordshire is the single biggest gyratory on the whole of the National Highways network. At about 1.2km in circumference, the junction sees some of the highest traffic flows on the M25.
As junction 9 of the M23 is the main access for traffic travelling to and from Gatwick Airport, this scheme is of particular local and national economic and political importance.
How the M25 got its name. The same principle explains the M25, which at its oldest point (the section crossing Surrey) follows the path of the older A25. These roads are all in the South East, which forms Zone 2 of the country's motorway system. This explains why they all contain 2 somewhere in their name.