It shall be unlawful for any person to go upon any bus carrying passengers for hire in the City carrying any flammable liquid or any other article which in the reasonable judgment of any motorman or conductor of such bus would present a danger to passengers, and any motorman or conductor of such bus is hereby empowered to use such reasonable force as may be necessary to prevent any person carrying flammable liquid or other such articles from going upon any such bus or to eject such person from the vehicle. (Code 1981 § 46-25. Code 1995 § 154-33.)