@kjhealy
"The Subway has higher daily throughput than every TSA Airport in the United States combined."
One trivia category last night was T/F. Had this statement come up, I'd have guessed wrong with the unshakeable conviction of a 9-year-old. And I say that as someone who rode the subway multiple times a day on varying routes for years.
Completely aside, is your tab icon meant to represent the gradients of a heat map?