1507893 said:So what provision do we make on country lanes, where you 2x speed ratio is comfortably exceeded (comfortably in the sense of "by some margin" as opposed to anything at all comfortable)? Do we buy strips of land to create parallel cycle routes or do we tell the people there "Sorry it's for the bold and experienced only. You can drive, catch the daily bus, or man up and get on with it"?
It depends on the lane obviously. Those in Lincolnshire or South Shropshire with grass up the middle aren't really an issue as the traffic volume is negligible, some in Essex or the Manchester suburbs I can think of are rural race tracks and the answer is to enforce low speeds. How one does this is problematic without environmentally intrusive monitoring devices or chipped vehicle regulators. At any rate, such lanes are generally an extension to suburban A and B roads where such driving is the norm, so I believe those are the ones that need tackling first.