Abstract
In a previous article it was argued to use a so called travel model in order estimate travel times in urban networks. In the present article a model is presented to derive time flow functions for assignment purposes. Travel time is related to link and intersection characteristics, traffic flow characteristics, behavioural parameters, etc. Basic for our approach is the derivation of separate travel time functions for links and intersections, subsequently delays are assumed to play the major role in total travel time loss. Intersection delays are estimated using stochastic waiting models.