I drive on my commute to work. I wouldn’t mind offering a free ride to people who are going the same direction as I am. The public transportation system is not very good where I live, so I would guess a lot people would be interested. Is there some kind website or app where I can write where and when I’m going, so people who are going the same direction and time can connect with me? There would be no payment involved at all. It would be a rewarding social thing do as a driver and if a lot of people started doing it, I would go as a rider once in a while as well.
I feel like this service would yield the most literal illustration of the free rider problem ever.