Abstract
A theoretical city in which the homes and work places have independent bivariate normal distributions. One parameter characterizes the spread of homes and another the spread of work places. Six different routings are considered for this family of cities, namely rectangular, radial outer, inner and polar or radial/are radial. A linear combination of the average distance and of the expected number of crossings per pair of random paths is used to approximate the average travel time which is a measure of the overall traffic efficiency of a city.