ISO 20077-1:20 17定义了与加长车辆相关的概念和术语。 ISO 20077-1:20 17介绍了有关这些车辆的一般信息，指定了专用术语，并描述了与加长车辆相关的其他标准的相互关系。 ISO 20077-1:20 17关注事项: -具有四个或四个以上车轮的公路车辆，其设计和制造主要用于运载人员，并在2012年6月19日最后修订的联合国第1号特别决议TRANS/WP.29/1045中定义为第1类车辆； -设计和制造的主要用于运输货物的四个或四个以上车轮的公路车辆，这些车辆在TRANS/WP.29/1045号联合国特别决议中被定义为第2类车辆，最后一次修订于2012年6月19日， 这些道路车辆仍然符合车辆制造商的规格。虽然本文档提到了已经标准化的接口和连接到这些接口的设备（例如外部测试设备），但是这些接口和设备的规范不在本文档的范围内。

ISO 20077-1:2017 defines the concepts and the terms related to extended vehicles. ISO 20077-1:2017 presents general information regarding these vehicles, specifies the dedicated terminology and describes the interrelation with other standards related to extended vehicles. ISO 20077-1:2017 concerns: - road vehicles with four or more wheels designed and constructed primarily for the carriage of persons that are defined as Category 1 vehicles in the United Nations Special Resolution No.1 in TRANS/WP.29/1045, as last amended on 19 June 2012; - road vehicles with four or more wheels designed and constructed primarily for the carriage of goods that are defined as Category 2 vehicles in the United Nations Special Resolution No.1 in TRANS/WP.29/1045, as last amended on 19 June 2012, where these road vehicles are still in accordance with the specifications of the vehicle manufacturer. While this document mentions already standardized interfaces and devices (e.g. external test equipment) connected to these interfaces, the specification of these interfaces and devices is not within the scope of this document.