Another thing that is not mentioned ever is that if we do attain
the semi-utopian situation of maybe having 40% of people who
commute do so on bicycles, lanes will be needed to keep bicyclists IN.
Human nature being what it is, it is fair to believe that people would be
straying all over the road in this unlikely but still possible scenerio.
If people came out in these huge numbers, segregation would be necassary.
Religious VCealotism could not possibly work in a situation where many
people rode, always.