If the flow of cars is to dense the vehicle may have trouble changing to the left. SUMO currently cannot distinguish changing to the left at on-ramps from changing to the left in other settings so there are some constrains on what the cars on the left lane will do to help the ego contrary to what you might expect (this is to avoid jamming on motorways). regards, Feel free to send me input files to take a look though. It might still be something else. Jakob
2014-03-25 14:26 GMT+01:00 Judhakitt Tirathumcharoen <[email protected]>: > Dear Jakob and Manish, > > > Thank you very much for your fast response. It will be very impressive to > try your simtram in sumo-0.17. K=3 is very reasonable to simulate the real > situation. May I know when approximately simtram will be available to > download. > > Regarding to Q3, I forgot to mention in my scenario that, in the 2 lanes, > there are flow of cars passing on the left lane, while the vehicle on right > lane try to overtake the obstacle. What I was trying to see is a vehicle > overtaking the obstacle on the right lane into the flow of cars, which are > passing on the left lane. > May I send my input files and screenshots to Jakob in the separate email > > > Best Regards, > > > Judhakitt > > > > > Quoting manish chaturvedi <[email protected]>: > > Missed to answer the second question. Sorry about that. Here it follows: >> >> *Regarding slow down of simulation:* >> >> >> In Simtram, each lane is divided in to number of strips (configurable).. >> >> And at all the places in the sumo code where we do iterations for lanes >> (e.g. for updating vehicle positions and all), we need to do nested loops >> for number of strips as well. >> >> Hence, it seems that if we have k strips in a lane, our simulation is k >> times slower than the actual Sumo. k=3 is reasonable for simulations >> involving two wheelers. >> >> Sincerely, >> Manish >> >> >> >> On Tue, Mar 25, 2014 at 2:42 PM, manish chaturvedi <[email protected] >> >wrote: >> >> Sir, we need to acknowledge that we are/were not part of the Simtram >>> team.. >>> >>> We got the source code from Simtram Team and started adapting it for >>> sumo-0.17 for our own research work and were able to do it successfully. >>> >>> We will upload the adapted simtram version for sumo-0.17 and share the >>> link with user community soon. >>> >>> Currently we are working on documentation part it may take about 2 weeks >>> time. >>> >>> Sincerely, >>> >>> Manish >>> >>> >>> >>> >>> >>> On Tue, Mar 25, 2014 at 12:21 PM, Jakob Erdmann < >>> [email protected]> wrote: >>> >>> Hello Manish, >>>> I'm happy to hear that you remain active. >>>> Can you tell us when the downloads will be active again? >>>> Regarding your report on slow simulations: >>>> At what number of vehicles do you experience drastic slowdown? >>>> How much slower compared to regular SUMO is SimTRaM? >>>> >>>> best regards, >>>> Jakob >>>> >>>> >>>> 2014-03-25 5:24 GMT+01:00 manish chaturvedi <[email protected]>: >>>> >>>> regarding Q1 of Judhakitt: >>>> >>>>> >>>>> We have adapted SIMTRAM for sumo-0.17 version on fedora and its working >>>>> fine.. >>>>> >>>>> We started with the fresh sumo-0.17 version and incorporated all the >>>>> changes from simtram source code and it adapted fine. >>>>> >>>>> Only problem we are facing is, with large number of vehicles, the >>>>> simulation slows down drastically.. >>>>> >>>>> Please let us know if further assistance needed.. We will be more than >>>>> happy to reply.. >>>>> >>>>> Sincerely, >>>>> >>>>> Manish and Viral >>>>> >>>>> >>>>> >>>>> >>>>> On Sun, Mar 23, 2014 at 7:08 PM, Jakob Erdmann < >>>>> [email protected]> wrote: >>>>> >>>>> Hello, >>>>>> regarding your questsions... >>>>>> >>>>>> Q1: putting two vehicles next to each other on the same lane is >>>>>> currently >>>>>> not possible. There is a sumo version called SiMTraM writen by Indian >>>>>> researchers which does this ( >>>>>> http://www.civil.iitb.ac.in/~vmtom/SiMTraM_Web/html/index.html) but >>>>>> it >>>>>> appears the project is inactive (at least the download links are >>>>>> broken). >>>>>> Also, it is based on a very old version of SUMO so it can be expected >>>>>> to >>>>>> contain a long list of issues which have since been fixed. >>>>>> >>>>>> Q2: there is a switch in the code in src/:microsim/MSLCM_LC2013.cpp >>>>>> #define OVERTAKE_RIGHT_FORBIDDEN true. By setting this to false, >>>>>> overtaking on the right will be possible. (We should probably turn >>>>>> this >>>>>> into an option, see http://sumo-sim.org/trac.wsgi/ticket/1212) >>>>>> >>>>>> Q3: in my tests vehicles overtake on the left without slopping (I see >>>>>> a >>>>>> small slowdown of 0.2m/s which maybe shouldn't be there but nothing >>>>>> larger. Can you send input files that let us reproduce a simulation >>>>>> with >>>>>> implausible behavior? >>>>>> >>>>>> best regards, >>>>>> Jakob >>>>>> >>>>>> >>>>>> 2014-03-21 12:43 GMT+01:00 Judhakitt Tirathumcharoen < >>>>>> [email protected]>: >>>>>> >>>>>> > Dear Sirs, >>>>>> > >>>>>> > >>>>>> > My name is Judhakitt and I am studying post-master in ITS at >>>>>> Eurecom, >>>>>> > France. >>>>>> > I have been working on impact of motorcycle mobility by using SUMO >>>>>> in >>>>>> > the past 4 months and supervised by Prof. Jerome Härri. >>>>>> > At the moment, in my semester project (duration March-June 2014), >>>>>> the >>>>>> > objective is to model the motorcycle mobility in SUMO and would like >>>>>> > to ask you for suggestions. >>>>>> > >>>>>> > (Remark: "overtaking vehicle" in this case means motorcycle) >>>>>> > >>>>>> > Q1) Is it possible to put more than one vehicle (for example vehicle >>>>>> > type is motorcycle, half-width, and length of passenger car) in the >>>>>> > same lane at the same time? >>>>>> > Some research papers show that up to 3 motorcycles can be on the >>>>>> same >>>>>> > lane at the same time in the real world. What I have tried to model >>>>>> > before was to create virtual sub-lane only for motorcycle (cars are >>>>>> > not allowed), and another lane for car and motorcycle. However there >>>>>> > can just only be 2 motorcycles at the same position (one in >>>>>> sub-lane, >>>>>> > and one car/or one motorcycle in the normal lane). >>>>>> > >>>>>> > Q2) Are there any possibility to let vehicle on left lane to >>>>>> overtake >>>>>> > on the right lane? >>>>>> > I have noticed that a vehicle cannot overtake on the right side. For >>>>>> > example there are 2 lanes on the same direction (called left and >>>>>> right >>>>>> > lane). If one vehicle suddenly stops on the left lane, the following >>>>>> > vehicles are stopping and queuing up, but they do not overtake to >>>>>> the >>>>>> > right. >>>>>> > I discuss with Prof. Härri and he told me that SUMO blocks this by >>>>>> > law. There should be some part in source code that allows vehicle to >>>>>> > overtake on the right side. >>>>>> > >>>>>> > Q3) Why a vehicle stops at a static obstacle, without simple >>>>>> > overtaking continuously? >>>>>> > For example, there are 2 lanes, right and left. A car (or any >>>>>> vehicle) >>>>>> > stops on the right lane for long time. (In this case, vehicles are >>>>>> > allowed to overtake, not blocking by law). When the following >>>>>> vehicles >>>>>> >>>>>> > approaching to this stopping car, they are stopping before trying to >>>>>> > overtake. I try to simulate in different scenario with different >>>>>> > speed, acceleration, but I never make the following vehicles >>>>>> overtake >>>>>> > suddenly, continuously without stopping after the stopping car. >>>>>> > >>>>>> > >>>>>> > Please kindly feedback or let me know if you need anything from my >>>>>> side. >>>>>> > >>>>>> > >>>>>> > Best Regards, >>>>>> > >>>>>> > >>>>>> > Judhakitt >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> ------------------------------------------------------------ >>>>>> ------------------- >>>>>> > This message was sent using EURECOM Webmail: >>>>>> http://webmail.eurecom.fr >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> ------------------------------------------------------------ >>>>>> ------------------ >>>>>> > Learn Graph Databases - Download FREE O'Reilly Book >>>>>> > "Graph Databases" is the definitive new guide to graph databases and >>>>>> their >>>>>> > applications. Written by three acclaimed leaders in the field, >>>>>> > this first edition is now available. Download your free book today! >>>>>> > http://p.sf.net/sfu/13534_NeoTech >>>>>> > _______________________________________________ >>>>>> > sumo-devel mailing list >>>>>> > [email protected] >>>>>> > https://lists.sourceforge.net/lists/listinfo/sumo-devel >>>>>> > >>>>>> >>>>>> ------------------------------------------------------------ >>>>>> ------------------ >>>>>> Learn Graph Databases - Download FREE O'Reilly Book >>>>>> "Graph Databases" is the definitive new guide to graph databases and >>>>>> their >>>>>> applications. Written by three acclaimed leaders in the field, >>>>>> this first edition is now available. Download your free book today! >>>>>> http://p.sf.net/sfu/13534_NeoTech >>>>>> _______________________________________________ >>>>>> sumo-devel mailing list >>>>>> [email protected] >>>>>> https://lists.sourceforge.net/lists/listinfo/sumo-devel >>>>>> >>>>>> >>>>> >>>>> >>>> >>> >> > > > ------------------------------------------------------------ > ------------------- > This message was sent using EURECOM Webmail: http://webmail.eurecom.fr > > ------------------------------------------------------------------------------ _______________________________________________ sumo-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sumo-devel
