Why is M25 called M25?

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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Prime Minister Margaret Thatcher opened the M25 in October 1986. However, the original three lane layout was soon unable to cope with the volume of traffic. Officially called the London Orbital Motorway it was soon dubbed 'Britain's biggest car park' and 'The road to hell' because of severe delays.

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The M25 or London Orbital Motorway is a major road encircling most of Greater London. The 117-mile (188-kilometre) motorway is one of the most important roads in the UK and one of the busiest.

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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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Traffic. Near Heathrow Airport, the M25 is six lanes wide in each direction. The M25 is one of Europe's busiest motorways.

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Junctions and services The M25 has been criticised for having too many junctions; 14 of them serve only local roads. In 2016, Edmund King, president of the Automobile Association, attributed congestion on the M25 to excessive junctions.

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It actually is concrete. Specifically it's slabs of concrete with expansion gaps between the slabs because concrete doesn't bend. There are apparently techniques to smooth it out a bit, but we don't do that here.

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structures on the M25 are the two tunnels in its north-eastern quadrant; the Holmesdale Tunnel at Waltham Cross (between junctions 25 and 26) and the Bell Common Tunnel at Epping (between junctions 26 and 27).

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Answer. Answer: A motorway just relates to the A road that it's relieving pressure from. The reason there is no M7 is that the A7, which runs from Carlisle to Edinburgh has no need for a motorway to relieve it.

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Hanger Lane Gyratory – West London. Magic Roundabout – Swindon. Gravelly Hill Interchange (Spaghetti Junction) – Birmingham.

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Firstly, I had to plan the route. All I knew was that it would make sense to start and finish at the Dartford Crossing, although at the time I didn't realise that pedestrians couldn't walk across the bridge. The M25 motorway circles London but because it is a motorway, you can't actually walk on the M25 itself.

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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.

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