[bootlooped]

The good thing about charging is that is discourages use of a finite resource, and encourages the use of cheaper and more environmentally friendly options like car pooling, public transit, etc... If you make something free people soak it up.

That said I'm not sure how much those nudges matter when people need to get to class, and they might already have a schedule too busy to coordinate car pooling, and maybe their town or city doesn't have very good public transit. All of those things applied to me when I was going to college. I just parked in the closest residential neighborhood, which should probably be seen as a negative side effect of charging students for parking on campus.