From Dishforth up to the northern edge of Tyneside, the A19 is a major route running east of the A1, serving all the large and important towns that its more famous counterpart doesn't reach.
It was the UK's only single-carriageway motorway, and twenty years ago it ceased to exist. This is the story of the strange fascination it held, and of my place in history.
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.