The fatal mistake we have been making is to sacrifice every other form of transportation to the private motorcar—and to offer, as the only long-distance alternative, the airplane. But the fact is that each type of transportation has its special use; and a good transportation policy must seek to improve each type and make the most of it. This cannot be achieved by aiming at high speed or continuous flow alone. If you wish casual opportunities for meeting you neighbors, and for profiting by chance contacts with acquaintances and colleagues, a stroll at two miles an hour in a concentrated area, free from vehicles, will alone meet your need.
(Lewis Mumford, The Highway and the City. 1956. p. 247)