If the purpose of a toll is to bring the private costs of a drivers actions into

Question:

If the purpose of a toll is to bring the private costs of a driver’s actions into equality with the total costs (including congestion), should the size of the toll depend on how many passengers are in the car? Should it depend on the size of the car (or differ between cars, trucks, and busses)? Should it depend on the time of day that it is collected?

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