与传统的汽油内燃机相比，电动和替代燃料车辆对第一和第二响应者构成了不同的危险。涉及事故的氢车辆（H2V）包括燃料电池车辆（FCV）可能存在与燃料储存和高压系统相关的独特危险。 与混合动力电动汽车和FCV的高压系统相关的电气危险已经在母文件SAE J2990中得到解决。因此，本推荐实践通过参考SAE J2990解决电气问题，并补充SAE J2990，以解决与氢能车辆事故相关的潜在后果，并建议通用程序，以在事故发生后帮助保护应急响应人员、牵引和/或回收、储存、维修和救助人员。研究了行业设计标准和工具，并在适当的情况下建议负责组织实施。

Electric and alternative fueled vehicles present different hazards for first and second responders than conventional gasoline internal combustion engines. Hydrogen vehicles (H2V) including Fuel Cell Vehicles (FCVs) involved in incidents may present unique hazards associated with the fuel storage and high voltage systems. The electrical hazards associated with the high voltage systems of hybrid-electric vehicles and FCVs are already addressed in the parent document, SAE J2990. This Recommended Practice therefore addresses electric issues by reference to SAE J2990 and supplements SAE J2990 to address the potential consequences associated with hydrogen vehicle incidents and suggest common procedures to help protect emergency responders, tow and/or recovery, storage, repair, and salvage personnel after an incident has occurred. Industry design standards and tools were studied and where appropriate, suggested for responsible organizations to implement.