大型卡车*碰撞成因研究（LTCCS）基于由美国交通部（DOT）下属联邦汽车运输安全管理局（FMCSA）和国家公路交通安全管理局（NHTSA）开展的为期三年的数据收集项目。LTCCS 是首个旨在确定导致严重大型卡车碰撞的关键事件及相关因素的全国性研究，使 DOT 及其他机构能够实施有效的对策，以降低此类碰撞的发生率和严重程度。

The Large Truck* Crash Causation Study (LTCCS) is based on a three-year data collection project conducted by the Federal Motor Carrier Safety Administration (FMCSA) and the National Highway Traffic Safety Administration (NHTSA) of the U.S. Department of Transportation (DOT). LTCCS is the first-ever national study to attempt to determine the critical events and associated factors that contribute to serious large truck crashes allowing DOT and others to implement effective countermeasures to reduce the occurrence and severity of these crashes.