https://www.bart.gov/news/articles/2021/news20210122
Air filter

Ventilation on BART

What you need to know about airflow and filters
https://www.bart.gov/schedules/crowding
BART riders on-board a Fleet of the Future train, some sitting and some standing.

Occupancy Data

Charts outlining average passenger loads on trains
https://www.bart.gov/news/articles/2020/news20200526
2 station agents in masks greeting riders

Welcome Back Plan

What riders can expect as region reopens