Conn. Gen. Stat. § 13a-143a: Driveway permits.

No person shall construct a new driveway or relocate an existing driveway leading onto a state highway without first obtaining a permit from the Commissioner of Transportation. In determining the advisability of issuing such permit, the commissioner shall include, in his consideration, the location of the driveway with respect to its effect on highway drainage, highway safety, the width and character of the highway affected, the density of traffic thereon and the character of such traffic. The person to whom the permit is issued shall comply with the provisions and restrictions contained therein at his own expense.