本SAE推荐实施规程提供了用于总宽为2032 mm或以上车辆的高位刹车灯和高位转向信号灯的试验程序、要求和指南。本文件适用于卡车、大客车、厢式拖车和其他永久性结构高度大于2800 mm的车辆。本文件不适用于校车、卡车牵引车、杆式拖车、平板拖车、双轮皮卡车和拖车牵引车。高位刹车灯和高位转向信号灯的目的是向后续车辆的驾驶员提供一个信号，通过干预车辆。

This SAE Recommended Practice provides test procedures, requirements, and guidelines for high-mounted stop lamps and high-mounted turn signal lamps intended for use on vehicles 2032 mm or more in overall width. This document applies to trucks, motor coaches, van type trailers, and other vehicles with permanent structure greater than 2800 mm high.This document does not apply to school buses, truck tractors, pole trailers, flat-bed trailers, pick-up truck with dual wheels and trailer converter dollies. The purpose of the high-mounted stop lamp(s) and high-mounted turn signal lamp(s) is to provide a signal over intervening vehicles to the driver of following vehicles.