That's probably a significant part of it. Also accessibility of the monthly passes. I used to live near a rail stop in Tempe/Phx area, and would use it when I

That's probably a significant part of it. Also accessibility of the monthly passes. I used to live near a rail stop in Tempe/Phx area, and would use it when I had to go to the airport or to Downtown Phx as it was easier than dealing with parking. The ticket kiosks were a bit of a pain, but easy enough, widely available and not overly expensive. I didn't use it that much, but did see ticket checks on one of the trips, nobody was without one.