Conn. Gen. Stat. § 21-61: Exemption as to location.

Notwithstanding any statutory provision to the contrary, the Commissioner of Transportation may, with the consent of the selectmen of a town, the mayor of a city or the warden of a borough, permit the erection of advertising signs designed to benefit local residents or industries, within the limits of highways, other than limited access highways, but not in any location where such signs will obstruct the view along any highway.