How on earth does the system ever work at all? By promising a schedule that doesn't assume nothing goes wrong. Time padding means the inevitable minor delays c

How on earth does the system ever work at all? By promising a schedule that doesn't assume nothing goes wrong. Time padding means the inevitable minor delays can be absorbed quickly, and infrequent longer delays are recoverable. Also, I don't know about Toronto, but most of the big delays in Boston are issues with equipment rather than passengers. Derailment, signal failure, etc. should scale with vehicle traffic rather than vehicle occupancy/passenger count, and big delays decrease how much traffic is going around at the moment.