Bibb v. Navajo Freight Lines, Inc. 359 U.S. 520 (1959)

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BIBB v. NAVAJO FREIGHT LINES, INC. 359 U.S. 520 (1959)

A unanimous Supreme Court here voided a state highway safety regulation because the state failed to demonstrate sufficient justification to balance the burden it imposed on interstate commerce. An Illinois statute required trucks using its highways to employ a particular mudguard, outlawed in Arkansas and distinct from those allowed elsewhere. The Court said that cost and safety problems alone were insufficient reason for invalidation, given the "strong presumption of validity" owing to the statute. But, by creating a conflicting standard, the Illinois statute had seriously interfered with and imposed a "massive" burden on interstate commerce.

David Gordon
(1986)

(see also: State Regulation of Commerce.)