New measures of traffic infrastructure (for example a new road link) and improvements on existing network elements (for example, shortening of travel time on a tram line by means of technological measures) lead to intermodal and intramodal shifts causing induced traffic at short notice. If a net is chosen of such a width, that all effects of one or more measures in respect of changes in traffic volume on all sections of the net can be shown, the traffic shifted from other modes, the traffic shifted within the same mode and the induced traffic can be described. Shifted traffic can be calculated quite accurately thanks to known traffic demand models, as long as the measures lead to alterations of time and/or costs (for example, Probit and Logit models). At the moment it is difficult to determine the induced traffic. Up to now there are only some initial models for these calculations. (A)
Abstract