How the Homeless Survive Winter in Provo, Utah

Not having a car, I either walk everywhere or take the bus. Walking provides a constant educational experience. Today as I was strolling down Center Street this curious contraption caught my attention, so I snapped a few photos. It's parked in front of the Convention Center, and I observed it stay there for several hours without the cops hassling the occupant.
I don't know if this is DIY or if somebody is giving these out now.