The A823(M) is a tiny spur from the M90, just north of the Forth Road Bridge, that connects South Dunfermline to the river crossing and the motorway network.
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 1920s and 30s saw a huge roadbuilding boom in London's suburbs. Some of those roads are incredibly well known, but here are five Arterial Roads that have been almost completely forgotten.