These pages offer a quick way to look up information and learn about the British road network - a miniature reference library of useful knowledge and trivia.
S2, D3, D4M - talk among road enthusiasts bristles with arcane abbreviations for different types of road. What do they mean? All is explained in our handy guide.
Frequently Asked Questions about the road network, some more obscure than others.
A glossary of the terms often used by people discussing British roads. Some are engineering terms, some were created by road enthusiasts, some have multiple meanings. All are defined here as clearly as possible.
Explore the different types of interchange you'll find all over the UK on limited access roads — roads with flyover junctions that separate fast moving traffic from the local road network.
They're everywhere, but what do they mean? Join us on a journey through the UK's road sign system, from the colours and shapes that form their building blocks to the meaning of the most complex parking restrictions.