Colo. Rev. Stat. § 43-1-219
There are hereby created two separate funds, one to be known as the state highway fund and the other to be known as the state highway supplementary fund. All money paid into either of the funds shall be available immediately, without further appropriation, for the purposes of the fund as provided by law. Money transferred to the state highway fund pursuant to section 24-75-219 (7)(c) and (7)(f) and any interest and income derived from the deposit and investment of such money may be expended for multimodal projects, as defined in section 43-4-1102 (5). Any sums paid into the state treasury, which by law belong to the state highway fund or to the state highway supplementary fund, shall be immediately placed by the state treasurer to the credit of the appropriate fund. Upon request of the commission or of the chief engineer, it is the duty of the state treasurer to report to the commission or to the chief engineer the amount of money on hand in each of the two funds and the amounts derived from each source from which each such fund is accumulated. All accounts and expenditures from each of the two funds shall be certified by the chief engineer and paid by the state treasurer upon warrants drawn by the controller. The controller is authorized as directed to draw warrants payable out of the specified fund upon such vouchers properly certified and audited. Nothing in this part 2 shall operate to alter the manner of the execution and issuance of transportation revenue anticipation notes provided in part 7 of article 4 of this title 43.
C.R.S. § 43-1-219
(1) For the transfer to the state highway supplementary fund of moneys paid to the department of transportation for expenses incurred in conducting the closure of highways for athletic or special events, see § 24-33.5-226 (3)(d). (2) For the legislative declaration in SB 21-260, see section 1 of chapter 250, Session Laws of Colorado 2021.