Stop summary files represent average daily ridership at the stop level over the course of the relevant period. Trolley ridership data was generated using automatic passenger counters (APCs). Bus data is calculated from a variety of sources depending on the route and year. The bus data files represent average daily fall ridership from 2014 – present. Accurate weekend bus data was not available until 2017 at which point SEPTA had more widespread APC coverage. No bus data is available for Fall 2020 due to a malware attack. APC bus data was also not available for articulated vehicles and the Boulevard Direct from August 2020 through February 2022 due to the malware attack.