Commercial air travel became more popular and convenient for more Americans after World War Two. Also, the Interstate Highway system had its genesis during the Eisenhower administration in the mid-1950's. Although its primary purpose was for national defense, it proved overall to be a great time saver for people travelling great distances. The public, subsequently, could travel at their convenience to any destination instead of being encumbered by a train schedule. Truckers also could haul freight more competively against the railroads because of the Interstate Highway system.