But since years of campaigning have failed to persuade governments either to extend rail electrification north from Edinburgh or to build a western by-pass, there is doubt that Edinburgh will be prepared to pay for it.
Deutsche Bank forecast that light-vehicle electrification will turn world oil demand downward from 2016, falling by 2030 to 8 percent below current levels or 40 percent below most forecasts.
In doing so, the bank again parts company with its peers, represented by the British Bankers' Association (BBA), which has opposed the electrification.
Even if Mr. Winzen turns out to be wrong by half, it would still represent a radical shift in personal mobility, a wholesale electrification of the world's rolling stock.