Travel times computation for dynamic assignment modelling
BUISSON ; LEBACQUE ; LESORT
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
BUISSON ; LEBACQUE ; LESORT
Résumé / Abstract
Travel time is the basic criterion used in most assignment modelling processes. However, few examples of systematic in-depth investigation exist in the literature concerning the definition and properties of travel time models that are in use. The aim of this paper is both to make a review of the various existing travel time formulas and concepts and to introduce some new formulas which we hope will be suitable for reactive dynamic assignment. The paper is based on the following plan: first, a description of travel time functions and models used in dynamic assignment modelling (considering both the more theoretical formulations and the more application-oriented computational algorithms used in traffic flow simulation models); second, the analysis in the context of macroscopic traffic modelling of three travel time concepts : experienced travel time, predictive travel time and instantaneous travel time. Various computational formulas are developed, suitable for both interrupted and uninterrupted traffic and most macroscopic models.
