Axhausen, Kay W.
This report contains the introduction of a probabilistic approach (IVT Approach) for the computation and assessment of travel time losses together with a software program that was developed for that purpose. The software program is implemented in an Excel Sheet. The approach is compared with a different approach from Germany of the same purpose, the estimation of travel time losses in the form of generalized costs. Both approaches are a enhancements of standard processes and compute travel time losses for a whole year, based on an hourly yearlong demand profile. The IVT approach was developed at the Institute of Transport Planning and Systems at the Swiss Federal Institute of Technology in Zürich and is based on a probabilistic computation of the breakdown probability and the following delays, early delays and late delays. The LfV Approach from Germany was developed at the Lehrstuh für Verkehrswesen of the Ruhr-Universität Bochum and is based on a queueing model. Both methodologies are presented and explained in this report as well as compared, using demand profiles from Switzerland and Germany. In the case of low volumes of travel demand, the IVT approach computes more realistic travel time losses and the LfV approach gives higher estimates for very high demand volumes. For medium volumes the results of the two approaches are similar. The typical trendline of the travel time losses as a function of traffic volume are similar for all the different demand profile. Profiles with a more pronounced day peak are more similar then flatter ones. The report also contains examples of application of the two approaches in the Swiss Freeway network that shows that both of the approaches can be suitable, depending on the situation. Over all, we recommend the IVT approach for application in Switzerland Show more
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Journal / seriesEidgenössisches Departement für Umwelt, Verkehr, Energie und Kommunikation UVEK, Bundesamt für Strassen
Organisational unit03521 - Axhausen, Kay W.
02226 - NSL - Netzwerk Stadt und Landschaft / NSL - Network City and Landscape
NotesSchlussbericht VSS 2011/103
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