https://www.bart.gov/news/articles/2021/news20210122
Ventilation on BART
What you need to know about airflow and filters
https://www.bart.gov/schedules/crowding
Crowding Data
Charts outlining average passenger loads on trains
https://www.bart.gov/news/articles/2020/news20200526
Welcome Back Plan
What riders can expect as region reopens
