The national speed limit for cars is 70mph on motorways and dual carriageways with a central barrier or reservation, 60mph on single carriageways and 30mph in built-up areas.
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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.
More than half of the total length of the German autobahn network has no speed limit, about one third has a permanent limit, and the remaining parts have a temporary or conditional limit. Some cars with very powerful engines can reach speeds of well over 300 km/h (190 mph).