Hi guys, I'm currently facing the same kind of issue while working on a distributed version of SUMO. In the centralised scenario, traffic jam occurs on roads which are situated on borders in the distributed scenario. Therefore, though there is enough place for the cars as shown by the centralised scenario, SUMO refuses to add the new cars arriving on the border. I've tweak SUMO source code by myself a while ago and I was wondering if there would be a way to tweak it to remove/reduce the safe distance required for inserting new car. Any advice about where in the source code I should look to modify this behaviour ?
Thanks in advance for your help, Regards, Quentin 2014-07-16 9:36 GMT+01:00 <[email protected]>: > Hi Jakob, > > I've tried a few options, and not had much luck. So, I commented out > lines 699-702, and on the vehicle collision, the sim freezes. Also > tried a few variations of commenting out some additional content, with > same result. > > But, thats not so bad for me, because I use the teleport from traci as > the trigger to tell an agent its crashed. Without the teleport I'd > have to think of some alternative. > > The other problem, is I still don't have much luck getting a quick > re-insert, I seem to need a gap of about 10 seconds. I guess, its not > totally unreasonable, a motorway vehicle travelling at normal speed, > for braking distance to a stationary vehicle. But, would none of the > vehicle parameters affect this? I tried reducing minGap to very small, > didn't make much difference. > > If theres no easy option, no problem, I'll just work the scenario > around having larger vehicle gaps. > > Thanks > > Vincent > > Quoting Jakob Erdmann <[email protected]>: > > > Hello, > > since insertions are only performed if they are deemed safe under all > > circumstances, an insertion speed of zero means that the following > traffic > > needs to have sufficient space to come to a complete stop as well (when > > starting to brake in the next simulation step). If you find that an even > > larger gap is required, it might point to a bug in the insertion code and > > should be investigated. > > However, in your case it sounds as if you would be better of by simply > > deactivating the 'telepor-after-collision' behavior. > > This is something we would like to make configurable eventually anyway > > (see http://sumo-sim.org/trac.wsgi/ticket/1102) > > Until this is implemented you may comment out some lines in MSLane.cpp. I > > think 699-702 should be enough. > > regards, > > Jakob > > > > > > 2014-07-13 23:05 GMT+02:00 <[email protected]>: > > > >> > >> Hi, > >> > >> To simulate a crashed vehicle holding up a lane, when I catch a > >> teleported vehicle, I re-insert it at its previous position, with a > >> small route and zero speed. > >> > >> I've set up a dedicated vehicle type for this, mainly so that I can > >> show it in a unique colour, but it does mean I can play with vehicle > >> parameters too. > >> > >> The problem I have, is that I think the 'safe distance' metric might > >> be kicking in but in a more extreme way than usual? For some reason I > >> seem to need about 9 to 10 seconds gap between vehicles, compared to > >> inserting vehicles into the road network normally which is around 2-3 > >> seconds gap. > >> > >> I've tried changing minGap in case this made a difference, but doesn't > >> seem to. The only unique thing I can think of is that I insert the > >> 'crashed' vehicle back with a speed of 0. > >> > >> The weirder thing, is that if the gap is approx 8 seconds, it seems > >> insufficient, and so a number of vehicles go past the location I wish > >> to re-insert the crashed vehicle, but then all of a sudden it will > >> insert, maybe 2-3 seconds ahead of another vehicle. > >> > >> I'm a bit stuck, the only workaround I have at the moment is to make > >> sure there is a large gap behind any vehicle that is likely to crash, > >> so that it can be inserted, which isn't so realistic. > >> > >> Thanks > >> > >> Vincent > >> > >> > >> > >> > >> > ------------------------------------------------------------------------------ > >> _______________________________________________ > >> sumo-user mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/sumo-user > >> > > > > > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > -- Quentin Bragard Diplômé de l'INSA de Lyon, Département Informatique. Ph.D Student in PEL, University College of Dublin ------------------------------------------------------------------------------ _______________________________________________ sumo-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-user
