The support files include the children group.csv and the elderly group.csv, which are categorised according to Table 1.

The num in the data represents the number of accidents at the location; the hdm represents the accident location; the con represents the road safety control; the roadty1 represents the road alignment; the roadty2 represents the type of intersection section; the roadty3 represents the road class; and the iso represents the type of segregation. (ZIP)本数据集各字段的含义如下：num字段代表对应点位的事故发生数量；hdm字段代表事故发生点位；con字段代表道路安全管控措施；roadty1字段代表道路线形（road alignment）；roadty2字段代表交叉口路段类型；roadty3字段代表道路等级；iso字段代表隔离设施类型（segregation）。该数据集采用ZIP压缩格式。