N.Y. Comp. Codes R. & Regs. tit. 9, § 415.5 – Authorized vehicles.

(a) The use of parkways is limited to motor vehicles registered as passenger vehicles by the Commissioner of Motor Vehicles, excluding. however, such vehicles when adapted to or used for the carrying of commercial goods or materials or any vehicle which is of an overall height of more than 94 inches. Except as otherwise provided in this section or under written permit issued by the commissioner, the use of any other vehicle on a parkway is prohibited.
(b) Pedestrians, horses, bicycles, limited use vehicles, limited use motorcycles and other motor vehicles having a maximum performance speed of less than 55 miles per hour are prohibited from using any parkway.
(c) Taxis and limousines will be permitted to operate over a parkway but in no case will cruising or soliciting of passengers en route be permitted.
(d) Outing buses will be permitted to operate by the shortest possible route from outside a park to discharge or pick up their passengers from a picnic or bathing area only if a permit to enter the park has been issued by the commissioner to the organization sponsoring the outing, picnic, etc. Buses must proceed over the route and to the parking field designated in the permit.
(e) Public omnibuses will be permitted to operate only under special permit.
(f) Trucks or trailers will be permitted to operate on the Montauk Loop, Bay, and Ocean Parkways, on the Meadowbrook Parkway south of Merrick Road (State Route 27A) and on the Robert Moses Causeway, Hecksher Spur, and Wantagh Parkway South of Sunrise Highway (State Route 27), where it is necessary for them to do so to service and supply such areas or contiguous areas. Any vehicle or equipment or combination thereof exceeding 8 feet in width, 13 feet in height, 50 feet in length or having a weight greater than 22,400 pounds on any one axle shall not be operated over the aforesaid parkways, including bridges incidental thereto, except under written permit issued by the commissioner.
(g) Nothing contained in this section shall apply to the wagons, trucks and apparatus of a fire department, insurance patrol, police department, or ambulance, or to emergency repair wagons, when responding for emergency work in case of fire, accident, public disaster, impending danger or emergency on the parkways or in the parks.
(h) Vehicles having any name, insignia or sign painted or displayed thereon for business or advertising purposes are prohibited on parkways except as provided herein. For purposes of identification, name and address only of the owner of a vehicle, on the sides thereof, in letters not more than two inches in height, shall not be construed as being displayed for business or advertising purposes. Vehicles owned and operated by governmental agencies, buses permitted to operate on the parkways, and trucks permitted in accordance with subdivision (i) of this section, are excepted from the provisions of this subdivision.
(i) Licensed ambulances for sick or injured persons shall be permitted to operate over parkways when on emergency service, but subject to all the provisions of this Chapter regulating traffic, including limitations on the rate of speed.
(j) Towing and pushing.
No person shall cause or permit a vehicle to be towed or pushed by another vehicle on any parkway, except that a disabled vehicle may be towed by a tow truck authorized by the Department of Transportation in accordance with the provisions of 17 NYCRR Part 190.