§ 393.81 Horn.
发布02-19
生效03-23
摘要总结AI 辅助解读
本条款规定美国联邦法规第49篇中关于商用车辆喇叭的强制性安全标准。要求所有巴士、卡车、牵引车及在“driveaway-towaway”（自驾拖运）作业中的受控机动车，必须配备处于良好状态的喇叭及其致动元件，以确保能发出充分且可靠的警示信号。该规定旨在保障道路行驶安全，适用于跨境陆运及美国境内相关运输业务。
Every bus, truck, truck-tractor, and every driven motor vehicle in driveaway-towaway operations shall be equipped with a horn and actuating elements which shall be in such condition as to give an adequate and reliable warning signal.