(a) A motor vehicle, except truck tractors, pole trailers, vehicles engaged in driveaway-towaway operations, and truck tractors and semitrailer combinations described in subsection (b) hereof that were manufactured after December 31, 1952, that is so constructed that the body, or the chassis assembly if without a body, has a clearance at the rear end of more than thirty inches from the ground when empty, shall be provided with bumpers or devices serving similar purposes which shall be so constructed and located that:
(1) The clearance between the effective bottom of the bumpers or devices and the ground shall not exceed thirty inches with the vehicle empty.
(2) The maximum distance between the closest points between bumpers or devices, if more than one is used, shall be twenty-four inches.
(3) The maximum transverse distance from the widest part of the motor vehicle at the rear to the bumper or device shall be eighteen inches.
(4) The bumpers or devices are located not more than twenty-four inches forward of the extreme rear of the vehicle.
(5) The bumpers or devices are substantially constructed and firmly attached. Motor vehicles constructed and maintained so that the body, chassis or other parts of the vehicle afford the rear-end protection contemplated shall be deemed to be in compliance with this section.
(b) A truck tractor and semitrailer combination with a semitrailer length longer than fifty feet, the frame or body of which extends more than thirty-six inches beyond the rear of its rear axle and is more than thirty inches above the roadway, shall not be operated on the highways of this City unless equipped with an underride guard on the extreme rear of the frame or body. The underride guard shall meet all of the following requirements:
(1) Provide a continuous horizontal beam having a maximum ground clearance of twenty-two inches, as measured with the vehicle empty and on level ground.
(2) Extend to within four inches of the lateral extremities of the trailer on both left and right sides.
(Res. 93-512. Passed 7-26-93.)