Why do planners love charging for parking but not for congestion?

Granted, Don Shoup is a charismatic spokesman for his ideas on parking, but parking charges and congestion charging are both applications of Bill Vickrey’s pricing ideas. But you can’t mention parking with some zealous planner affixing you with glittering eye like the ancient mariner and subjecting you to a lecture on economics, but road pricing? Eh. Politically infeasible. They shrug and move on. Or talk about how it just can’t work.

I think they are interested in parking charges because many of them work at the municipal level and parking charges both manages the parking problem, penalizes the sinful auto, and yields a pot of money. (But congestion pricing does the same thing!)