The maintenance and repair, as provided in this section, shall be done either by the forces of such city and with its equipment, or by its contractor, or by a combination of these two methods.
Such agreement for maintenance and repair as authorized by this section, shall include the procedure and method for regulation of street openings, and appropriate provisions for the care, protection and patching of the pavement or pavements, and curbs, the care and protection of drainage facilities and structures, the maintenance of adjacent roadside and landscaped areas to include the care of trees, shrubs and groundcovers and the cutting of grass at specified locations and to the extent as shall be deemed by such commissioner of transportation to be for the best interest of the public, control of snow and ice on any such state interstate highway or portion thereof included in such agreement, the performance of repairs and alterations, and the operation and care of traffic lights, directional guides and controls, and parking controls. Such maintenance and repair, whether done by the city pursuant to an agreement therefor as authorized by this section, or by the state because of the absence of such agreement, as the case may be, shall not include (a) services of lighting, cleaning, sweeping and sprinkling of any such state interstate highway or portion thereof, all of which services are deemed to be the normal maintenance of streets by the city, or (b) any work on or in connection with subsurface installations and structures that are owned and operated by the city, including sanitary sewers, gas mains, water lines and conduits and appurtenances thereto.
N.Y. High. Law § 340-B