Hello, I included the flow definitions per your advice and it works. Thank you . However,
1) see that in spite of using JTRrouter, I have to explicitly mention the edges for cars to take in "flows" XML file. Otherwise , they all take a single route . 2) is there a way to define "vehicle type ID", "speed" , "accel" and "decel" parameter values for cars in flows file? Since rou.xml is the output file when using JTRrouter I don't know where to specify the aforementioned parameters. Regards, Pooja Voladoddi. > On 29-Dec-2013, at 5:54, Michael Behrisch <[email protected]> > wrote: > > Hi, > so the correct answer is probably there is only one traffic light > _control_ but there may be one _signal_ for each link (which may be > more than four). > > For the dummy nodes: No you don't need them. > > Best regards, > Michael > > 2013/12/29 Pooja Voladoddi <[email protected]>: >> >> Thanks, >> I do not need to change the links, just the signal at each link independent >> of other signals at the same junction. I guess what I meant to ask is when >> we declare type "traffic_light" , by default there are 4 traffic signals or >> only 1 traffic signal that is declared when net convert is used. >> >> Im assuming it would be possible to invoke JTRouter for generating route >> files using the python script where traci is used. Do let me know if this >> assumption is wrong. >> >> >> By dummy nodes, I was referring to the "node generation" per this link >> http://sourceforge.net/apps/mediawiki/sumo/index.php?title=Tutorials/Quick_Start >> where nodes 911 - 914 are referred to as dummy nodes that are necessary for >> traffic analysis. >> >> >> Regards, >> Pooja. >> >>> On Sunday, December 29, 2013, Michael Behrisch wrote: >>> >>> Hi, >>> yes of course you can set the signals via TraCI but you will not be >>> able to change the connections (the links) itself. >>> I do not know what you mean by dummy nodes, but yes every edge needs a >>> start and an end node. >>> >>> Best regards, >>> Michael >>> >>> 2013/12/27 Pooja Voladoddi <[email protected]>: >>>> Hello, >>>> >>>> Thanks for replying. >>>> >>>> -- would it not be possible to access individual traffic lights (as in, >>>> each >>>> signal per link) using getRedYellowGreenState and setRedYellowGreenState >>>> in >>>> the python traci script for controlling traffic ? >>>> Or is importing the csv description the only way to go about it ? >>>> >>>> >>>> --are dummy nodes required at the end of each link ? >>>> >>>> >>>> >>>> Regards, >>>> Pooja. >>>> >>>>> On Friday, December 27, 2013, Michael Behrisch wrote: >>>>> >>>>> Hi, >>>>> flow definitions are described here: >>>>> >>>>> >>>>> http://sumo-sim.org/userdoc/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#Repeated_vehicles >>>>> except that for router input they do not have route childs but from >>>>> and to attributes like trips. >>>>> For the traffic lights I think you misunderstood the documentation, >>>>> there is usually one traffic light logic per junction but it may be >>>>> one signal per link, see here: >>>>> http://sumo-sim.org/userdoc/Simulation/Traffic_Lights.html >>>>> >>>>> Best regards, >>>>> Michael >>>>> >>>>> 2013/12/26 Pooja Voladoddi <[email protected]>: >>>>>> (Forgot to send it to the whole group) >>>>>> >>>>>> Hello, >>>>>> >>>>>> Thanks for your reply. >>>>>> >>>>>> 1) how are flow definitions different from trip files (as in what >>>>>> parameters >>>>>> are defined in it ? I know the syntax of rou.xml and trips.xml but I >>>>>> don't >>>>>> know what goes into flow definitions) . >>>>>> >>>>>> 2) any hints /clues on how to provide only one traffic light per >>>>>> link(/lane) >>>>>> at a junction instead of one traffic light controlling all the links >>>>>> (/lanes)? >>>>>> >>>>>> Merry Christmas to all. >>>>>> ----- >>>>>> >>>>>> Regards , >>>>>> Pooja. >>>>>> >>>>>> >>>>>>> On Thursday, December 26, 2013, Michael Behrisch wrote: >>>>>>> >>>>>>> Hi, >>>>>>> you omitted the flow definitions in your call to jtrrouter. >>>>>>> >>>>>>> Best regards, >>>>>>> Michael >>>>>>> >>>>>>> 2013/12/24 Pooja Voladoddi <[email protected]>: >>>>>>>> Dummy nodes- >>>>>>>> >>>>>>>> In implementing a simple grid-like junction, is it necessary for >>>>>>>> later >>>>>>>> versions of SUMO (0.18) to add dummy nodes at the ends of >>>>>>>> links/edges >>>>>>>> ? >>>>>>>> >>>>>>>> >>>>>>>> JTRROUTER - >>>>>>>> After referring to >>>>>>>> >>>>>>>> http://sumo-sim.org/userdoc/Demand/Routing_by_Turn_Probabilities.html >>>>>>>> >>>>>>>> I tried to generate route files like so ----> >>>>>>>> >>>>>>>> jtrrouter --turn-ratio-files=trial_one.turns.xml >>>>>>>> --net-file=trial_one.net.xml --output-file=trial_one.rou.xml >>>>>>>> >>>>>>>> however, i am getting an error like this ----> >>>>>>>> >>>>>>>> Error: No route input specified. >>>>>>>> Quitting (on error). >>>>>>>> >>>>>>>> -- If i am not wrong, JTRRouter gives an output rou.xml file so >>>>>>>> what >>>>>>>> it >>>>>>>> does >>>>>>>> it mean by this error? >>>>>>>> --Also, i was wondering if i could instead write the routes >>>>>>>> explicitly >>>>>>>> using >>>>>>>> python instead of adding probabilities to make the traffic >>>>>>>> movement >>>>>>>> more >>>>>>>> realistic. >>>>>>>> >>>>>>>> >>>>>>>> One-to-many traffic light control >>>>>> ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. 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