Hello, consider that the selected routes are chosen based on weights which are (roughly correct) at the time of departure. I say roughly because the weights are computed by adapting the weights from the previous step with the current values which makes them more stable but also make them lag behind a little when there are strong changes in the traffic state. (see --device.routing.adaptation-weight). Furthermore, traffic state may change while the vehicle is en route which may make the selected route non-optimal. This is likely to happen if a large number of vehicles get the same route. regards, Jakob
2014-07-04 1:57 GMT+02:00 Luan, Jianlin <[email protected]>: > Hi, > > I try to reroute vehicles using reroute devices. The route of each vehicle > to be rerouted is desired to be calculated at 60 seconds before it actually > departs. > > Here is the part of rerouting configuration in my .sumocfg file: > <routing> > <device.rerouting.pre-period value="60"/> > <device.rerouting.adaptation-interval value = "60"/> > <device.rerouting.probability value="0.5"/> > <device.rerouting.with-taz value="true"/> > </routing> > > > The problem is that I find some of the rerouted vehicles have longer > travel time than those not rerouted. > > Here is the method I use to compare the travel time: > (1)As I set the adaptation-interval to 60 seconds, I divide the entire > simulation period into 60-second departing windows. > For example, the start time of simulation is 34200, then the first > departing window is 34200 to 34260. > (2)The actual simulation time step that a vehicle departs is used as the > vehicle departure time (not when the reroute is calculated). > (3)Within each window, the travel time of the vehicles that have the same > O-D is compared. > > > I don't know why this happens and I would really appreciate it if someone > can provide me some documents about how the routes of the rerouted vehicles > are calculated and examples of rerouting configuration in the sumocfg file. > > Kind Regards, > Jianlin > > > > ------------------------------------------------------------------------------ > Open source business process management suite built on Java and Eclipse > Turn processes into business applications with Bonita BPM Community Edition > Quickly connect people, data, and systems into organized workflows > Winner of BOSSIE, CODIE, OW2 and Gartner awards > http://p.sf.net/sfu/Bonitasoft > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
