C.R.S. § 42-8-101

In order to facilitate enforcement of the laws of the state of Colorado concerning motor carriers and the owners and operators of motor vehicles; to equally distribute the payments of any fees, licenses, or taxes imposed by the laws of this state on motor carriers and the owners and operators of motor vehicles, and to effect the collection thereof; and to assist motor carriers and the owners and operators of motor vehicles to comply with all tax laws, rules, and regulations pertaining to them, it is declared necessary to establish port of entry weigh stations on the public highways of this state.