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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because you'll have to travel for another 18 miles on the M25 before you can turn back. That 18 mile stretch between turnoffs is the longest distance between junctions on any of the UK's many motorways, making this infamous road the worst place in the UK to take a wrong turn.
M25 and A282Officially named the London Orbital, nicknamed the 'Road to Hell', and frequently derided as nothing more than a very big car park, this is the world famous and rightly notorious M25.
well to be honest, Its always busy on the M25, and severely worse during the rush 6-10am, 3-7pm. 5am is a good time to start out but you'll still pick up conjestion further on. So expect the worse, and keep your fingers crossed, make sure you listen our for traffic alerts on the car radio.
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.
We first calibrated our milometers to make certain they read the same distance for a stretch of road, and then I drove clockwise and my friend anti-clockwise on the M25. Our starting and finishing point was the South Mimms service station. The result was surprising: clockwise 120.30 miles, anti-clockwise 120.80 miles.
It'll come as no surprise to anyone who uses it frequently, but the average speed on London's orbital motorway is just over 25mph. That means it takes an average of five hours to circumnavigate the capital over the entire 117-mile route. The next slowest is the M4, another motorway notorious for delays.
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.
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.