CORRELATIONS BETWEEN ROAD TRAFFIC AND THE SIZE OF CITIES

In designing a transportation network, 2 fundamental problems must be solved: designing an overall system of roads and highways for a given region, territory, or city; and the determination of widths, lengths, and other special requirements of individual roads. In Europe, the demands of modern forms of transportation (primarily motor vehicles) have put a great strain on the street systems of cities that were laid out many years ago. This article discusses the ways in which traffic engineers, as participants in the reconstruction of cities, can help to bring about adequate and relatively permanent solutions to urban traffic problems. Traffic densities and distributions are examined, and suggestions for future urban traffic planning efforts are provided.