A20 | |
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![]() A20 near Swanley heading Westbound (London bound). | |
Route information | |
Length | 74.4 mi[1] (119.7 km) |
Major junctions | |
West end | ![]() |
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East end | ![]() |
Location | |
Country | United Kingdom |
Constituent country | England |
Counties | Greater London, Kent |
Primary destinations | Swanley Maidstone Ashford Folkestone |
Road network | |
The A20 is a major road in south-east England, carrying traffic from London to Dover in Kent. Parts of the route date back to turnpikes established in the early part of the 18th century. The line of the road throughout Kent runs closely in parallel with the M20 motorway.