Not sure what you mean by "road use tax". Most funding for roads in the US is from the general fund and not provided by any use tax. The potential property dam

Not sure what you mean by "road use tax". Most funding for roads in the US is from the general fund and not provided by any use tax. The potential property damage and/or physical injury (not to mention general wear and tear upon roadways) that a bicycle can produce is minuscule in comparison to the potential destructive power of the automobile. Much of the legal justification for registration/licensing and taxation of vehicles is born from these factors.