Just saw that article ref'd on TW w many theories on free bus pass benefits.
I say: Doesn't matter whom I would visit, talk to, and it's not primarily about avoiding isolation.
A free bus pass (esp one better than the mess I got into in L.A.) is the difference between:
a) I am in charge of my day and where I choose to go, or:
b) I am not in charge of my day, and must beg rides even to go to the doctor, much less where to have fun or be refreshed
(Yes, I know, the bus has to be going places I want to go.)
Any other theories? All I can say is I remember every moment of not driving before and after the lumbar fusion. I had to lend my car to a friend in exchange for being driven to grocery shopping, and HIRE someone to drive and go with me to the doctor, get food.. As a way to spend the rest of my life? Try it.