Final answer:
Transportation deregulation in the United States occurred in the late 1970s and continued into the 1990s, not the 1930s and 1940s. During the 1930s and 1940s, the U.S. government created the Civil Aeronautics Board (CAB) and the Interstate Commerce Commission (ICC) to regulate transportation.
Step-by-step explanation:
Transportation deregulation in the United States occurred in the late 1970s and continued into the 1990s.
This wave of deregulation eliminated or reduced government restrictions on various industries, including aviation, trucking, and railroads.
Companies were allowed to compete more freely and set their own rates for services.
However, the 1930s and 1940s were not a period of significant transportation deregulation.
During this time, the U.S. government created the Civil Aeronautics Board (CAB) to regulate airfares and routes, and the Interstate Commerce Commission (ICC) to regulate railroads and trucking.
It was not until several decades later that substantial deregulation occurred.