Hello, the step-length option (argument in seconds, default 1.0) is the correct tool for changing this. While we regularly use sub-second resolution we have hardly any experience with using values above 1. You should expect traffic to behave in unexpected ways and insertions would also be a problem. In the latest development version ( http://sumo.dlr.de/wiki/Downloads#SUMO_-_Latest_Development_Version) you will get new options which may help with your problem:
1) The mesoscopic simulation core MESO is opened to the public, It uses the same input data as SUMO but runs much faster (with simplified dynamics): http://sumo.dlr.de/wiki/MESO 2) Vehicle departures can be configured using departPos="last" which should allow high flows even with increased step-lengths. Regarding simulation output, there are various options for aggregated output and defined intervals. You could also use the state-saving facilities and pre-defined time steps. See http://sumo.dlr.de/wiki/Simulation/Output#values_for_edges_or_lanes http://sumo.dlr.de/wiki/Simulation/SaveAndLoad regards, Jakob 2016-04-05 8:43 GMT+02:00 Yu Deng <[email protected]>: > Dear all SUMO users, > > I am running SUMO for a large network for up to 4 days. I understand thta > most traffic following models were developed in second but I kind of need > to increase the timestep to minutes or 5/10 mins. > > I have come across this function. > https://sourceforge.net/p/sumo/mailman/message/32876223/ > <time> > <step-length value="3600" /> > </time> > > However, when I used it, it doesn't seem right. Yes, per step each vehicle > does travel much further than it does with a smaller time step. The issue > seems like only one or two cars can departure each time which overwrites > the step-length function. > > Can someone tell me how to set a different time step and are there another > setting I need to change to make it right? > > Another question is I am getting a very large xml output file, however, I > only care about the last time step or certain time steps. So I am wondering > are there any possible way I can choose only to output last time step or > selected time steps? > > Kind Regards > DY > > > ------------------------------------------------------------------------------ > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > ------------------------------------------------------------------------------ _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
