Legal Question in Traffic Law in Colorado

Re: Law code

Well, it does not quite say that, but I think you refer to CRS §42-4-1101(1) "no person shall drive a vehicle on a highway at a speed greater than is reasonable and prudent under the conditions then existing."

This is the speed limit law for the state. Local governments can set more specific laws. The posted speed limit is generally considered to be reasonable and prudent, but you are welcomed to argue otherwise in the right circumstances. You may win.