Hello Joerg, Thank you for reporting this issue which I can confirm as a bug ( http://sumo.dlr.de/trac.wsgi/ticket/3155). best regards, Jakob
2017-05-29 15:58 GMT+02:00 Jakob Erdmann <[email protected]>: > Hello, > the option --collisions.check-junctions is very sensitive to the geometry > of internal lanes. If this geometry is to "tight" it may trigger collisions > even though the simulation logic works as expected. On the other hand, > collisions which are detected without this option indicate either unsafe > traffic lights, unsafe parameterization or a bug. > > If you send me the scenario I will take a look. > regards, > Jakob > > 2017-05-29 14:25 GMT+02:00 Joerg Schweizer <[email protected]>: > >> Dear all, I am pretty active in simulations today and observed many >> collisions in my traffic scenario. So I looked at a simple network with a >> single junctions when exposed to a reasonable traffic flow. >> >> For the sumo simulation, I switched on the collision.check-junctions >> option. As a result, I got 8 collisions per hour at a single 4-leg priority >> junction (with a total of 750 vehicles/h entering from 2 perpendicular >> legs). >> >> When I created vehicle rows (or platoons) by just setting speedDev to a >> large value (speedDev="0.5", all other parameters are default) then I got >> even 25 collisions per hour. I observed that in this case, vehicle rows >> occur and collisions happen when such vehicle rows enter the junction. >> >> I tried to impose more discipline by using a stop_priority junction. >> But also in this case many collision occurred. >> >> Are these collisions due to an over-sensible detection or is there a way >> avoiding them? I have already tweaked my vehicle parameters to the most >> cautious setting (infinite impatience, optimum driver skill). >> >> Any thoughts? >> >> Best wishes, >> Joerg >> >> >> -- >> Joerg Schweizer >> University of Bologna >> DICAM - Transportation Group >> Viale Risorgimento, 2, I-40136 Bologna, Italy >> Tel: +39 051 209 3338, Fax: +39 051 209 3337 >> >> ------------------------------------------------------------ >> ------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> sumo-user mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/sumo-user >> > > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
