New registrations of trailers, by load capacity (1 000 t)

The data in this dataset comes from the Common Questionnaire for Transport Statistics, developed and surveyed in co-operation between the United Nations Economic Commission for Europe (UNECE), the International Transport Forum (ITF) and Eurostat. The Common Questionnaire is not supported by a legal act, but is based on a gentlemen's agreement with the participating countries; the completeness varies from country to country. Eurostat’s datasets based on the Common Questionnaire cover annual data for the EU Member States, EFTA states and Candidate countries to the EU. Data for other participating countries are available through the ITF and the UNECE. In total, comparable transport data collected through the Common Questionnaire is available for close to 60 countries worldwide. The Common Questionnaire collects aggregated annual data on:Railway transportRoad transportInland waterways transportOil pipelines transportGas pipelines transport
For each mode of transport, the Common Questionnaire cover some or all of the following sub-modules (the number of questions/variables within each sub-module varies between the different modes of transport):Infrastructure (All modes)Transport equipment (RAIL, ROAD and INLAND WATERWAYS)Enterprises, economic performance and employment (All modes)Traffic (RAIL, ROAD and INLAND WATERWAYS)Transport measurement (All modes)
Accidents (ROAD only)
The Common Questionnaire is completed by the competent national authorities. The responsibility for completing specific modules (e.g. Transport by Rail) or part of modules (e.g. Road Infrastructure) may be delegated to other national authorities in charge of specific fields.

本数据集的数据源自运输统计通用问卷（Common Questionnaire for Transport Statistics），该问卷由联合国欧洲经济委员会（UNECE）、国际运输论坛（ITF）与欧盟统计局（Eurostat）联合制定并开展调研。
该通用问卷无法律法案作为支撑，仅基于参与国之间的君子协定；各国数据报送的完整程度各不相同。
欧盟统计局基于该通用问卷构建的数据集，涵盖欧盟成员国、欧洲自由贸易联盟（EFTA）国家以及欧盟候选国的年度运输数据。其他参与国的数据可通过国际运输论坛与联合国欧洲经济委员会获取。
通过该通用问卷收集的可比运输数据，总计覆盖全球近60个国家。
该通用问卷收集的年度汇总运输数据涵盖以下运输方式：铁路运输、公路运输、内河航运、输油管道运输、输气管道运输。
针对各类运输方式，该问卷包含下述部分或全部子模块（各子模块内的问题/变量数量因运输方式而异）：
- 基础设施（适用于所有运输方式）
- 运输装备（仅适用于铁路、公路及内河航运）
- 企业、经济绩效与就业（适用于所有运输方式）
- 运输量（适用于铁路、公路及内河航运）
- 运输计量（适用于所有运输方式）
- 事故统计（仅适用于公路运输）
该通用问卷由各国主管部门负责填写。特定模块（如铁路运输）或模块的部分内容（如公路基础设施）的填报职责，可委托给负责对应领域的其他国家主管部门承担。