Circulating vehicles broken down by year of registration

The dataset collects the annual data, referring to each municipality of the metropolitan area of Bologna, of the cars circulated in the name of the residents. The data are sorted by year of registration (vetustà).The annual data files are issued thanks to an agreement between the Municipality of Bologna and the Automobile Club of Italy (ACI) and come from the database of the Public Automobile Register (PRA).The aforementioned agreement expired in 2018. The data of the following years are extracted from the opendata portal of the Emilia Romagna Region (see).With the new agreement with ACI, the extracted data have a different structure and refer only to vehicles. The reference datasets can be reached at the following links:Circulation of vehiclesFood and environmental classification (EURO) vehicles Bologna本数据集收录博洛尼亚都会区各自治市以居民名义登记的在册流通汽车年度数据，数据按注册年限（vetustà）排序。 本数据集的年度文件依托博洛尼亚市政厅与意大利汽车俱乐部（Automobile Club of Italy, ACI）达成的合作协议发布，数据源自公共汽车登记系统（Public Automobile Register, PRA）的数据库。前述合作协议于2018年失效，2018年之后的年度数据则取自艾米利亚-罗马涅大区开放数据门户（详见相关说明）。 在与ACI达成新合作协议后，此次提取的数据结构有所调整，且仅涵盖机动车相关信息。相关参考数据集可通过以下链接获取： 1. 机动车流通情况 2. 博洛尼亚机动车欧盟（EURO）排放与环境分类