As a bike commuter in the Boston Area, I saw the BRIDJ vans (they were actually bigger than vans but smaller than busses, but I have not a name), during my commute. I could never see inside to see if the vehicles were full.
I looked into using them, but they didn't serve my area.
Seemed like a good idea, there was even talk they would be used when they cut late night T (bus) service again in Boston.
For an City that has such weak transportation, and terrible winter weather, they'll be missed here.