(a) vehicles with persons standing on the outside thereof, or trucks with persons sitting on the rear with feet dangling;

(b) vehicles in the charge of incompetent or intoxicated operators or operators under the influence of any narcotics or habit-forming drugs;

(c) vehicles having flat tires;

(d) vehicles with solid or metal tires, including steamrollers;

(e) pushcarts, wheelbarrows, bicycles, velocipedes, mopeds and similar vehicles (bicycles may be walked across the pedestrian paths of Marine Parkway Gil Hodges Memorial, Cross Bay Veterans Memorial and Triborough Bridges);

(f) vehicles loaded with garbage, papers, loose hay, straw or similar material not effectively covered;

(g) vehicles loaded with animals or poultry not properly confined;

(h) vehicles overloaded to such an extent that the means of propulsion are insufficient;

(i) vehicles with inadequate brakes;

(j) vehicles transporting hazardous materials, unless permitted under the rules and regulations governing transportation of hazardous materials via Triborough Bridge and Tunnel Authority facilities, as set forth in Parts 1024 and 1025 of this Title;

(k) buses with passengers standing between the driver and the front entrance door, or so located as to obstruct the view of the driver both front and/or sides;

(l) bicycles, motor scooters, except as hereinafter provided, whizzerbikes, motorettes and other similar small power-propelled vehicles, horse-drawn vehicles, mopeds, open top double- deck buses with passengers on top deck, gasoline tank trucks (loaded or empty), pedestrians, animals (except when properly confined in vehicle), and vehicles emitting excess smoke, are not permitted in the tunnels. Motor scooters having tire widths of at least three inches and outside tire diameters of at least 16 inches, and capable of maintaining a minimum speed of at least 30 miles per hour on the upgrade portions of the tunnel roadways, shall not be excluded from the tunnels. Motorcycles, motor scooters or any vehicles having tire widths less than three inches are not permitted to cross the Verrazano-Narrows Bridge;

(m) other vehicles which, in the judgment of the captain, lieutenant or the person immediately in charge of the facility, are likely to delay traffic, damage the facility, endanger persons or property or render the use of vehicular crossings unsafe; and

(n) ready-mix concrete vehicles with a load in excess of 8½ cubic yards of regular weight concrete or 11 cubic yards of lightweight concrete, except that four-axle trucks carrying loads up to 12 cubic yards shall be permitted to utilize the Queens Midtown and Brooklyn Battery Tunnels.