I recall that the plan was to replace the Hounslow Loop railway route through Chiswick eastwards with a section of ringway. That was at a time when railways were not seen as a part of the future (hence the Beeching cuts). It is notable that while London escaped the worst of the destruction, England's second city, Birmingham, went ahead with its series of ring roads - some of which have more recently been closed off to through traffic. And while London's M41 never got further than the section from Shepherds Bush roundabout to the Westway flyover, Birmingham suffered having the M6 built through the urban area, Spaghetti Junction and all.
Richard Greenhough ● 1356d