The Leeds Inner Ring Road is one motorway with two numbers, designated A58(M) from its western end to Claypit Lane and A64(M) from there to the eastern end.
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.
The UK has been driving in circles for a hundred years now, and this humble road junction has become part of British culture. Just what is so special about roundabouts?