Colo. Rev. Stat. § 43-1-1101
The general assembly hereby finds and declares that local government involvement in transportation planning is critical to the overall statewide transportation planning process. The general assembly recognizes that regional planning commissions and transportation planning regions are the proper forum for transportation planning and that the county hearing process is the proper forum for local government input into the five-year program of projects. However, the general assembly also recognizes that state involvement in transportation planning, through the department of transportation, is equally critical to overall statewide planning, and the general assembly recognizes the department of transportation as the proper body, in cooperation with regional planning commissions and local government officials, for developing and maintaining the state transportation planning process and the state transportation plan.
C.R.S. § 43-1-1101