How long does it take to drive around the whole M25?
6. The M25 is 117 miles - that's 188.8km - long and the second longest bypass in Europe, after Germany's Berliner Ring. 7. Apparently it would take you one hour and 40 minutes to drive all the way round it at 70mph.
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You can't drive a complete circuit of the M25. The M25 isn't a circuit. There's a bit between the beginning and the end which is the A282.
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.
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.
In particular, the best time to travel on the M25 clockwise if before 10am or after 7pm, especially tomorrow, as the busiest period will be in between then, the RAC estimates.
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.
No it is not. Although Greater London is mostly within the M25, parts of other Counties bordering Greater London (known as the Home Counties) are also within the M25, the largest is a portion of the County of Surrey.
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.