CTA - Ridership - Daily Boarding Totals

This dataset shows systemwide boardings for both bus and rail services provided by CTA, dating back to 2001. Daytypes are as follows: W = Weekday, A = Saturday, U = Sunday/Holiday. See attached readme file for information on how these numbers are calculated.本数据集收录了芝加哥交通局（Chicago Transit Authority, CTA）自2001年起的全市公交与轨道交通全系统上车人次统计数据。日期类型定义如下：W对应工作日（Weekday），A对应周六（Saturday），U对应周日/节假日（Sunday/Holiday）。有关该统计数值的具体计算方式，请参阅附带的自述文件。