| Re: [sumo-user] update of travel time |
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Hi, The implementation in SUMO is not 100% identical with the original Gawron model.
1. In the current SUMO, tau_g(s) is the cost for Route s, which is calculated from the aggregated and averaged link costs in the simulation in the current iteration. tau_d(s) is the cost for Route s in Driver d’s route
set, calculated in the previous iteration. 2. As the long as a route is in a route set, its cost will be updated in every iteration in SUMO. When the number of routes in a route set is more than 5 (current default), the routes with the smallest probabilities will
be removed from the route set. More related explanations can be found under the points: “Number of Routes in each traveller's route set” and “Updates of Travel Time” at
https://sumo.dlr.de/docs/Demand/Dynamic_User_Assignment.html
Kind regards, Yun-Pang Von: sumo-user <sumo-user-bounces@xxxxxxxxxxx> Im Auftrag von
ali mirzaei Hi everyone, In the ~.alt.rou file of iteration i, there are two routes r and s. In the next iteration, the r route is chosen and in ~.alt.rou of iteration i+1, we will update the travel time of these routes. According to what Gawron says, for not remembering
the routes which have not used for a long time, the updated travel time of the route s will be:
I want to know: 1- The difference between the underlined variables. 2- The meaning of "how long". Does is it refer to any specific number of iterations? Best regards, Ali |
