Harold Hitz Burton,
King v. United States (344 U.S. 254…
“ It is plain from the nature of the inquiry that the rate level, to which both classes of traffic were raised, was found reasonable on the basis of the traffic as a whole. Where the conditions under which interstate and intrastate traffic move are found to be substantially the same with respect to all factors bearing on the reasonableness of the rate, and the two classes are shown to be intimately bound together, there is no occasion to deal with the reasonableness of the intrastate rates more specifically, or to separate intrastate and interstate costs and revenues. ”
