What do you want from a ski lift? I know, I know: no queues, accesses great terrain, a big “Experts only” sign to scare away the riffraff. But you can determine all of that stuff fairly easily by studying the map, and I’m assuming that you already ski at off-peak times, in whiteouts, using the singles line, and generally manage queueing efficiently yourself.
But sometimes you just want to get lots of laps in, with the greatest possible height gain in the least time. You know some of the rules: use the steepest lifts, try the gondolas, but is it better to take that 7-minute fast chair or the steep 10-minute T bar? So I want to maximize VPM (Vert per Minute).
Have a look at https://awf.github.io/vpm