What is the longest slip road in the UK?

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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The A1 also known as the Great North Road is the longest numbered road in the United Kingdom, at 410 miles (660 km). It connects London, the capital of England, with Edinburgh, the capital of Scotland.

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What's the longest motorway in the UK?
  • M6: Catthorpe, Leicestershire — Gretna Green, Dumfriesshire – Spread: 236 miles (379.8km)
  • M1: Staples Corner, London — Hook Moor, Yorkshire – Spread: 200 miles (321.9km)
  • M4: Chiswick, London — Pont Abraham, Carmarthenshire – Spread: 191.9 miles (308.8 km)


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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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Hardknott Pass is considered to be one of the most challenging in the UK. It has earned this consideration due to its series of hairpin bends and the high risk of ice on the road. It is a steep, twisting, single-track road that cuts right through the heart of the Lake District between the Duddon Valley and Eskdale.

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Britain's first motorway, the Preston by-pass, opened in 1958. Designed by Lancashire County Council under civil engineer Sir James Drake – regarded as the pioneer of the UK motorway network – it's now part of the M6. The next 10 years saw UK's network expand as hundreds of miles of motorway were built.

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The A897 between Helmsdale and Halladale Bridge, near Melvich, runs through several vast areas of wilderness and hamlets such as Kildonan, Kinbrace, Forsinard and Achiemore. Official data gathered by the Department for Transport shows that the road only has 416 cars per year.

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No Motorway
  • Cornwall.
  • Dorset.
  • Norfolk.
  • Rutland.
  • Suffolk.


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The widest multiple carriageway is found on the M61 in Greater Manchester where the motorway meets the M60 and A580. The road reaches a width of 2.5 miles (4 km) and features 18 lanes. The widest dual carriageway is the M25 at London's Heathrow Airport.

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IN JULY 1986, Life magazine described Nevada's Highway 50 from Baker to Dayton as the “Loneliest Road in America.” Life recommended that drivers have “survival skills” to travel the route. The Highway 50 Survival Guide is a challenge to travelers to learn for themselves about America's Loneliest Road.

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Built originally as a private road for King Fahd (SAU), the stretch of Highway 10 connecting Highway 75 in the Haradh area to Highway 95 in the west of Saudi Arabia is 240 km (149 mi) long. It cuts through the desert with no bends left or right, or any appreciable gradient up or down.

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Dangerous UK Roads – The Hardknott Pass One of the steepest roads in England, the Hardknott pass is also one of the narrowest and most difficult to drive. If you have the windows open you might even find yourself short of breath, as it's located about 400m above sea level.

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Magic Roundabout, Swindon The 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.

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The M45 is a motorway in Northamptonshire and Warwickshire, England and is 7.9 miles (12.7 km) long. It runs between junction 17 of the M1 motorway south east of Rugby and a junction with the A45 road southwest of Rugby. It has one of the lowest traffic volumes of the United Kingdom motorway system.

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The M96, positioned 20 miles from the M5 and the M50, has remained a well-hidden secret for years that saves countless lives. The 400-metre-long stretch of road in Moreton-in-Marsh has seen more crashes and traffic incidents than major routes because of its special purpose of training blue light workers.

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