Since 1996, three sections of a new A421 expressway have been built, progressively completing a fast route that serves to link Cambridge to Milton Keynes and Bedford to the wider world.
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.
This is the story of one man at Oxfordshire County Council who pre-empted the development of modern road signs - much to the annoyance of the men from the Ministry.