Hi, 1) No you can omit the route and simply add a from attribute to the flow definition just as with trips 2) you can add almost all attributes you can add to a vehicle or trip definition to a flow as well
Best regards, Michael 2014/1/9 Pooja Voladoddi <[email protected]>: > 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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