Adam Pearce for The New York Times describes the sad state of affairs that is the delayed subway trains in New York. One delay causes a ripple effect down the line, leaving little chance to get back on track. The more straightforward figures gear you up for the overall view at the end.
This was for New York specifically but is applicable to other transits and forms of transportation. See also the traffic gridlock simulation from a few years ago. It doesn’t take much for gridlock.
