Conn. Gen. Stat. § 13a-141a: State-wide footpath and bicycle trail plan.

(a) The Commissioner of Transportation shall prepare and, when necessary, revise a state-wide plan for the establishment of footpaths and bicycle trails to be located adjacent to state and local roads except: (1) Where the establishment of such paths and trails would be contrary to public health and safety; (2) if the cost of establishing such paths and trails would be excessively disproportionate to the need or probable use; or (3) where sparsity of population, other available ways or other factors indicate an absence of any need for such paths and trails.

(b) Said commissioner shall cause to be constructed and maintained such footpaths and bicycle trails adjacent to state roads as are designated in the state-wide plan prepared under subsection (a) of this section.

(c) Any private individual, corporation or other organization or any town or other public authority or agency wishing to construct and maintain a footpath or bicycle trail along any highway maintained by the state shall comply with the provisions of section 13a-141.

(d) No footpath or bicycle trail to be located, in whole or in part, within the boundaries of any transit district shall be constructed without the prior approval of such transit district. Any footpath or bicycle trail proposed by a transit district, whether or not said footpath or bicycle trail is included in the state-wide plan, shall be given priority in planning and construction.