To help orient the lost traveller who is not yet familiar with this part of South London, here is the full glory of the Croydon Ring Road, such as it is, in stylised map format.
This diagram includes the various odd concessions to the Croydon Tramlink system and the very numerous places that traffic stops at traffic signals, despite the various flyovers and underpasses on the way.
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 second part of the story, where we learn why exactly the M4 gets narrower on the final approach to Europe’s biggest city.
The M4 into London was one of the UK's earliest and most ambitious motorway projects. It was bold, pioneering... and almost instantly regretted.
Those funny black and yellow symbols are everywhere - and they might just get you back on track one day.
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