https://en.wikipedia.org/wiki/History_of_the_Bay_Area_Rapid_Transit#Origins_and_planning
http://www.sfexaminer.com/sanfrancisco/poll-shows-strong-support-for-bart-revenue-generators-workers/Content?oid=2527163
http://www.mercurynews.com/bart/ci_23763296/bart-strike-traffic-would-jump-10-over-last
http://www.mercurynews.com/traffic/ci_23601122/bart-strike-continues-through-july-4-holiday-causing