Do you mean bikes?

Even assuming that you can inconvenience large, double digit percentages of the population to use bikes as transportation, other large, double digit percentages of the population will fight bike infrastructure tooth and nail because for them it's worth (statistically) killing some people rather than slightly inconveniencing them.

Let alone fighting the car and oil and gas lobby.

I say this as a bike fan. I think bikes will ultimately win out a large share of transportation in most countries, in urban areas, but will be a long tough fight and I think we'll be where I hope everyone would be (the Netherlands) right about when I die, in 30-40-50 years...