Summary

Wiley Blount Rutledge Aero Mayflower Transit Company v…

Though necessarily related, in view of the nature of interstate motor traffic, the two privileges are not identical, and it is useless to confuse them or to confound a tax for the privilege of using the highways with one the proceeds of which are necessarily devoted to maintaining them. Whether the proceeds of a tax are used or required to be used for highway maintenance 'may be of significance,' as the Court has said, 'when the point is otherwise in doubt, to show that the fee is in fact laid for that purpose and is thus a charge for the privilege of using the highways.
Source: Wikisource

Wiley Blount Rutledge Aero Mayflower Transit Company v…

To accept appellant's position would mean that a state could never impose a minimum fee, but would have to adjust its taxes to the inevitable variations in the use of the highways made by various carriers. The Federal Constitution does not require the state to elaborate a system of motor vehicle taxation which will reflect with exact precision every graduation in use. In return for the $15 fee appellant can do business grossing $3,000 per vehicle annually for operations on Montana roads.
Source: Wikisource

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