I voted "and now for something completely different". I don't own a car, but nevertheless pay for roads in various taxes. I also pay for other basic infrastructure I may or may not need. I am also all for ramps in public offices providing access for handicapped persons (sorry if the term is not PC) even though I will pay more taxes because of that.
I don't think it is a good idea or even possible to earmark every tax euro so that it will only go towards services I currently use and nothing else. I think with my current contribution to tax pool I am already entitled to request more bike-friendly arrangements in public services, planning and construction.
--J