(a) Railroad companies shall keep in repair all structures under their tracks at any highway crossing. The state shall maintain and repair any structure (1) which spans a railroad and which supports a municipal road or (2) which spans any rail right-of-way which has been purchased by any state agency. The Commissioner of Transportation shall adopt regulations in accordance with the provisions of chapter 54, and may enter into an agreement with any municipality, as provided in subsection (f) of this section, establishing a method by which the cost of repairing and maintaining any structure provided for in subdivision (1) of this subsection shall be apportioned between the state and the municipality in which such structure is located. Any municipality may repair such structures over the tracks of a railroad company located within such municipality. For the purpose of obtaining liability insurance coverage insuring against any losses or injuries suffered during the performance of such repairs, such municipality may, in lieu of purchasing a separate policy of insurance naming such railroad company as an additional insured, purchase a rider to be attached to any existing insurance policy providing such liability coverage, naming such railroad company as an additional insured. The state shall maintain and repair the structures over any railroad on state-maintained highways constructed after January 1, 1955.

(b) The Commissioner of Transportation may expend up to the amount available annually from funds provided by specific appropriation from the Special Transportation Fund or other state funds in addition to any available federal funds to reconstruct, repair or replace with a new structure, together with the minimum approach work required for replacement, any existing structure carrying a town-maintained road or highway over a railroad when such structure is deemed critical from a traffic safety or load-carrying standpoint. The expense of any roadway construction on the approaches beyond what is required to build the new structure shall be paid by the municipality, if the work is done by or approved by the municipality.

(c) The Commissioner of Transportation may expend up to the amount made available from funds provided by specific appropriations from the Special Transportation Fund or other state funds in addition to any available federal funds to eliminate highway-railroad grade crossings by construction of grade separation structures and necessary approaches or by relocation of roads or highways maintained by a municipality to provide access to existing grade separation structures.

(d) The Commissioner of Transportation, as said commissioner deems necessary, may acquire land or rights of ingress to and egress from land abutting any project which he or she undertakes pursuant to this section in the same manner and with like powers as authorized and exercised by said commissioner in acquiring land for state highway purposes.

(e) The Commissioner of Transportation, as said commissioner deems necessary, may issue an order to any utility, as defined in § 13a-98f, to readjust, relocate or remove its facility, at its own expense, from any structure or road abutting a structure in order to perform maintenance or repairs pursuant to this section and such utility shall readjust, relocate or remove its facility promptly in accordance with such order, except that the cost of readjusting, relocating, or removing any municipal utility shall be apportioned on the same basis as the cost of constructing such structure or road abutting such structure. The cost of readjusting, relocating or removing any public service facility which abuts or is within, on, over or under any state highway shall be apportioned in accordance with the provisions of § 13a-126.

(f) The Commissioner of Transportation may enter into an agreement with the authorized official or officials of a municipality for the maintenance and removal of snow and ice from a footpath or sidewalk on any structure provided for in subdivisions (1) and (2) of subsection (a) of this section.