Abstract
Readily available data, such as regular census data regarding income and occupational status or special census data regarding travel characteristics and vehicle ownership can be useful in two ways. The first is to identify a region of homogeneity, or similar characteristics in which patterns of total travel behaviour are somewhat predictable. The second is to use the data to develop causative relationship between population characteristics and travel. Together with other data the final product is a higher level of true transportation service to all residents of a metropolitan area.