That looks like an interesting problem!<p>1) What are the metrics that mass transit operators tend to optimize for? Do you think they are in line with improving the service to customers?<p>2) How much is "dependability" of a mass transit service a metric that operators are interested in?<p>Intuitively I feel that there are places (e.g. Chicago) where I know that I can get out of the house, get the bus/train, and get to my destination with little variance in arrival time.<p>Others (like SF), where the variance on the arrival time seems much higher: e.g., generally related to unexpected delays while waiting for train/bus.<p>Do you think it's possible to optimize on such factors?