Abstract
This paper considers the need for, and application of, interactive colour graphics in the planning and management of road traffic systems. It considers the use of computer models of road traffic networks and the advantages of graphics in displaying the distribution of traffic and its impacts over a study area. Examples are given of the use of interactive colour graphics in the four stages of model application: data input, model operations, output displays, and analysis of output data. The examples are taken from the study of a “local area” traffic network, and a range of alternative traffic management plans proposed and implemented in that area. Interactive graphics provides transportation engineers with the means to merge their needs for computer-based methods and models with their desires to use and produce maps and diagrams as a principal means of communication.
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