Of all the radial routes striking out from the capital, those to the south are possibly the most interesting group. South London remains one of the poorest-served parts of the country in terms of road capacity, and most parts of it can only be reached by car after a slow and tedious journey along endless congested suburban roads and shopping streets.
The situation was no different in the 1960s, of course, and the GLC hoped to tackle it head-on with the Ringways plan. Its proposals included some quite astounding ideas, of which not one inch saw the light of day in its intended form. As well as upgrades to the existing A2 and A20, and the famous proposal to extend the M23 north towards central London, they also wanted at least one entirely new motorway radial route - one which remains largely a mystery.