Why does the M25 become the A282 at Dartford?

Despite all the hype, the M25 isn't even a full circle. The Dartford Crossing (comprising the Dartford Tunnels and the Queen Elizabeth II Bridge) over the Thames in the east and its approach roads are designated A282, because the first Tunnel was built in the 1960s as a local connection.



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The Dartford Crossing is owned by the UK Government. Highways England manages the crossing on behalf of the Department for Transport.

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To the east of London the two ends of the M25 are joined to complete a loop by the non-motorway A282 Dartford Crossing of the River Thames between Thurrock and Dartford. The crossing consists of twin two-lane tunnels and the four-lane QE2 (Queen Elizabeth II) bridge, with a main span of 450 metres (1,480 ft).

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Junction 2: (Start of Motorway) Gravesend, A2. Junction 3: Swanley, M20. Junction 4: Orpington, Bromley. Junction 5: Sevenoaks, M26.

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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.

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The issue at hand is a simple one. Between junctions 10 and 11 on the M25, the surface of the motorway consists of concrete blocks. The concrete surface itself is noisy, and there are gaps between each of the concrete blocks that constitute the road.

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The UK's widest motorway is not where you might expect to find it — in fact, it's on the unassuming M61 near Manchester.

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M4Simon wrote: The M27 junction 9 westbound off-slip scales at about 1500m from the Landranger mapping. Doesn't alter the fact that it's still the longest slip road.

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