The M25 or London Orbital Motorway is a major road encircling most of Greater London. The 117-mile motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the longest ring road in Europe upon opening.
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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.
Gatwick Airport Directions by CarLondon Gatwick is directly linked to the M23 motorway at Junction 9 and the A23 London-Brighton road. In just 10 minutes you can reach the M25 at Junction 7 which will connect you to the UK's extensive road and motorway network.
Come off the M25 at junction 7 and join the M23 southbound signposted for Gatwick airport. From the south: From the south coast take the A23 northbound towards the M23. Join the M23 and then continue to junction 9.
Magic Roundabout, SwindonThe Magic Roundabout is often listed as one of the most intimidating junctions in the UK. It's best shown in map form so you can see the complexity of its one-way systems feeding five roundabouts.
Gravelly Hill Interchange is the UK's busiest motorway junction and is one of the country's most iconic concrete structures which turned 50 last year. The winding labyrinth of roads along the M6 is also one of the biggest motorway interchanges in Europe and more than 200,000 vehicles travel on it daily.
Junctions and servicesThe 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.
Of the 1,987 people killed or seriously injured on the SRN in 2018, 245 occurred on the M25 alone. There were also 371 in the south-east of England, 342 in the Midlands, 292 in the east, 287 in Yorkshire and the north-east, 226 in the north-west and 224 in the south-west.