It shall be unlawful for any person to use City streets to park, stop, store, or operate a vehicle or part thereof in such a manner as to obstruct or impede the free flow of traffic thereon or the movement of pedestrians. Determination by the Commissioner that such a vehicle is actually obstructing traffic as aforesaid shall be considered prima facie evidence of a violation hereof. The Commissioner is authorized to cause such vehicle to be removed immediately so as to clear the streets. Such removal may be:to another part of the same street; to a side street; or effected in the manner hereinafter provided for impounded and abandoned motor vehicles. City Code, 1976/83, art. 31, §87 Ord. 69-343 Ord. 86-772