It shall be unlawful for any motor vehicle to be driven in any public park at a greater rate of speed than fixed by traffic signs erected therein, nor shall any such vehicle be parked in any of the driveways without being drawn well to the right, so as not to impede, obstruct or interfere with the free passage on such driveway of other vehicles and traffic. At night, both moving and parked motor vehicles shall be provided with adequate lights, front and rear.