Think back (if you are old enough) to 1970 and imagine you were then asked to write a plan for America for 2010. In 1970, you wouldn’t have known about personal computers, and so you probably wouldn’t expect that the number of people working at home in 2010 would be growing faster than the number of people riding transit to work.
In 1970 you wouldn’t have known about the Internet and FedEx (which began in 1973), and so you probably wouldn’t have predicted that many people in 2010 would shop from home and have their goods delivered to them by truck. (In 1970, for those who don’t remember, UPS home deliveries were rare.)
In 1970, the private railroads still operated passenger trains and the airlines hadn’t been deregulated yet so airfares were mainly at wealthy and business travelers. So you probably wouldn’t have predicted the doubling in per capita air travel or that air travel would be one-fourth the cost, per passenger mile, of passenger trains.
