Conn. Gen. Stat. § 13a-163: Payment for highway improvements.

The Comptroller, upon receipt of a certificate from the Commissioner of Transportation certifying the completion of any improvement, shall draw his order on the Treasurer in payment for the improvement as certified. The Treasurer shall pay such order from funds provided for that purpose. All appropriations made for the improvement of highways or bridges and all funds available under any statutory provision for such purpose without specific appropriation shall be held for such purpose until used by the commissioner.