Given the predictability of the Quad issues, why don't they always spin D on the weekends? I get that its often empty if the quad is running, but its a pretty good backup option (plus its a great little lift on its own, in my opinion). The only time I was upset on Saturday was when I was stuck in a loooong B line while D was sitting idle. Given the F/D options (not to mention the west side once it opens up), I'm fine with the sketchy quad situation, but the D lift is a key part of the Hunter crowd-avoidance strategy.
that's even more surprising to me.