Castle v. Hayes Freight Lines, Inc.

This case raises important questions concerning the power of states to bar interstate motor carriers from use of state roads as punishment for repeated violations of state highway regulations. The respondent Hayes Freight Lines, Inc. is such a carrier transporting goods to and from many points in Illinois and seven other states. This extensive interstate business is done under a certificate of convenience and necessity issued by the Interstate Commerce Commission under authority of the Federal Motor Carrier Act. Hayes also does an intrastate carrier business in Illinois under a certificate…