Interstate 60 Quotes

every 60 miles of interstate, add one hour; for every 50 miles of state highway, add another hour; and add an hour for every 40 miles of back roads and another for every 20 miles of city streets.

Between 1940 and 1970, output per person and output per hour continued to increase rapidly, in part as a result of three of the most important subsidiary spinoffs of IR #2—air conditioning, the interstate highway system, and commercial air transport—while the world of personal entertainment was forever altered by television.