prediction
Wishful thinking.
Phoenix is building a little choo-choo like Houston's. I predict it will get even less traffic. No sane person wants to walk to a mass transit stop in 116 degree weather. The only people who ride mass transit here are the illegals, and non-illegals don't like to hang with them on the bus/train.
Scottsdale subsidizes it's mass transit about $20 per ride because so few people ride it. That's more than it would cost for taxis.
Nobody here is in a mood to expand such nonsense.