Officially 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.
The wait is over! The full map of the Ringways, London’s unbuilt urban motorway network, is now online. Not even the system's planners had anything like this.
A field guide to the UK's road signs, explaining the colours, shapes, symbols and everything else you need to know to avoid putting a foot (or a wheel) wrong.