Justice Burton argued that the Court should have sustained Virginia's statute. He emphasized that the case did not present a Fourteenth Amendment challenge to segregation or a conflict with a federal statute. The majority instead invalidated a long-standing state police regulation by balancing its asserted local welfare benefits against its supposed burden on interstate commerce.
In his view, the record lacked the factual foundation necessary to show that Virginia's law created a serious, practical burden on interstate commerce. No federal government entity, state, carrier, or carrier customer had established that the rule materially obstructed operations. The carrier had operated under conforming regulations for years, and Virginia's highest court had unanimously upheld the statute.
Justice Burton rejected the majority's inference that differences among state laws alone proved a need for a single nationwide rule. Ten contiguous states required some separation on motor carriers, while eighteen states prohibited it, and other states took neither position. To him, that legislative diversity reflected different local conditions and judgments, not proof that uniform national treatment was indispensable.
He also reasoned that congressional inaction mattered. Congress had considered but not enacted national legislation on the issue, which suggested that the matter might appropriately remain subject to varied local approaches. Only Congress, he maintained, could affirmatively create national uniformity; the Court should not displace a state's established policy without concrete proof that it materially restricted interstate commerce.