Hello, vehsPerHour is still limited by the road capacity which may either be caused by insufficient intersection capacity (i.e. bad signal program, invalid turning lanes / connections) or inappropriate departure parameters. For the former, observe the simulation for long queues and tune the algorithm accordingly. For the latter, see http://sumo.dlr.de/wiki/FAQ#How_do_I_get_high_flows.2Fvehicle_densities.3F
If you do not see queues and there are still not enough vehicles after adjusting departure parameters, send me the scenarion for investigation. regards, Jakob 2018-04-25 23:52 GMT+02:00 Rahimi, Tariq Rahim < tariqrahim.rah...@rockets.utoledo.edu>: > Hello, > > > Am I only facing this problem? > > > I am giving my flow/route files a value of 5000 vehsPerHour in total for > 12 directions and specifying the time from 0 to 3600. I also want to > simulate 1.25x and 1.5x the amount in one hour. When I give it any value > above 5000 vehicles, SUMO is not simulating more than 5000 something in one > hour. I have tried different step-lengths, it simulates around 6000 > vehicles when I use a step-length of 0.8 or around it. The simulation stops > at 3600 because I specified so, other than that, it goes to 4000 seconds > and more. > > > In short, it vehsPerHour doesn't do what it should. > > > Thank you, > > > * ------------------------------------- Tariq R Rahimi* > > ------------------------------ > *From:* Jakob Erdmann <namdre.s...@googlemail.com> > *Sent:* Friday, April 20, 2018 1:21:55 AM > > *To:* Rahimi, Tariq Rahim > *Cc:* Sumo project User discussions > *Subject:* Re: A question about timestep and tau > > Hello, > when testing different intersection configurations it is a common > occurence that some scenarios do not permit all vehicles to arrive (or even > depart) within a given time frame due to congestion. > In that case you may either end the simulation early (and deal with the > reduced number of completed trips in your evaluation) or you may wait till > all vehicle have arrived (and deal with the increased duration in your > evaluation). > > - Sumo can automatically reduce the number of vehicles imported from a > route file by setting the option --scale. > > - if a queue extends beyond the length of the E2 detector, that part of > the queue is not registered. > > - tau is used in the car following models. see src/microsim/cfmodels > (MSCFModel_Krauss.cpp if you didn't configure another model). > > - thank you for the suggestion regarding lane geometries. We intend to fix > but did not yet get around to it: https://github.com/eclipse/ > sumo/issues/1758 > <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_eclipse_sumo_issues_1758&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=Fd4t6WsETRwPp1EbIX763UcF0ut36A-wZ3NuVlr7wdY&s=JEyPwTSrT_6ZA_d51oWGXpzChg5kP0ePLlMaImfT6dM&e=> > > regards, > Jakob > > 2018-04-19 21:54 GMT+02:00 Rahimi, Tariq Rahim <TariqRahim.Rahimi@rockets. > utoledo.edu>: > > I appreciate your time Jakob, > > > I was using the version 32 and it works fine now in the latest development > version. > > > I want to simulate 1 hour worth of traffic of 4933 vehicles, I am > generating the route_file through python so that the directions and > vehTypes can be random. > > I still have problem with depart, if I change it to 3600 timesteps as > well, all the vehicles won't finish in the 60 minutes allotted. > > What is a good solution for this through python? I tried --step-length > when running the configuration file in SUMO-GUI, it didn't work. Can SUMO > reduce the number of vehicles by percentage if I specify 40 minutes or 90 > minutes? I am using probabilities here in python as it is not equally > spaced if I am not wrong. > > > Also, you said I can obtain queue-length from E2 detector, what variables > can I get it from (adding or subtracting). If I use the E-2 detector for > just 50 meters and the queue length goes above that, what's the case here? > > > Additionally, can you give me the reference for tau's code file, I want to > know what it triggers? > > > Just a suggestion, can you guys think of a way so that the a 4-leg > intersection can have 2 outbounds and 4 inbounds (2 left turns) and the > geometry should align themselves automatically (the left storage lane would > be in front of the opposite directions left storage lane, currently the > medians are aligned), If I have a scenario with 4 inbounds and 2 outbounds, > it shows crashes. > > > Thank you, > > > * ------------------------------------- Tariq R Rahimi* > Graduate Student > Department of Civil Engineering > University of Toledo > Toledo, OH 43606 > > O: NI 1076 > P: 567-806-0945 > E: tariqrahim.rah...@rockets.utoledo.edu <http://www.utoledo.edu> > tariqrrah...@gmail.com <http://www.utoledo.edu> > > ------------------------------ > *From:* Jakob Erdmann <namdre.s...@googlemail.com> > *Sent:* Wednesday, April 11, 2018 2:19:36 PM > > *To:* Rahimi, Tariq Rahim > *Cc:* Sumo project User discussions > *Subject:* Re: A question about timestep and tau > > Did you install version 0.32.0 or did you use the latest development > version from here: http://sumo.dlr.de/wiki/Downlo > ads#SUMO_-_Latest_Development_Version > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_Downloads-23SUMO-5F-2D-5FLatest-5FDevelopment-5FVersion&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=s6pSl2G1DvLPFuwCOHqBbvrfyOhyrKvjZx2XHd8COEw&s=ai8TcAqafGE6EuPFlniJEBMtwz8XBZoJ_P-ja_1fGYE&e=> > ? > > You can obtain queue-length using the lanearea detector: > http://sumo.dlr.de/wiki/Simulation/Output/Lanearea_Detectors_(E2) > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_Simulation_Output_Lanearea-5FDetectors-5F-28E2-29&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=s6pSl2G1DvLPFuwCOHqBbvrfyOhyrKvjZx2XHd8COEw&s=X_RGJRoWtLQIf_oFtEsWSIUIsSkKTy_SYRHH6TH0mBQ&e=> > > A good measure of congestion is time loss. A global value can be obtained > by activating the statistics output: http://sumo.dlr.de/wiki/Simula > tion/Output#Aggregated_Traffic_Measures > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_Simulation_Output-23Aggregated-5FTraffic-5FMeasures&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=s6pSl2G1DvLPFuwCOHqBbvrfyOhyrKvjZx2XHd8COEw&s=e6v--ISk2YnpK2wqQVUtwqGAZj2KEjck_yJvrBo1bqE&e=> > > regards, > Jakob > > 2018-04-11 19:33 GMT+02:00 Rahimi, Tariq Rahim < > tariqrahim.rah...@rockets.utoledo.edu>: > > I appreciate your response, > > > I installed the newer version just yesterday and I am still getting > waitSteps in the Tripinfo output and I don't get any waitingTime. > > > Additionally, where can I get a good measure of queue length and > congestion? > > > Thank you, > > > * ------------------------------------- Tariq R Rahimi* > > ------------------------------ > *From:* Jakob Erdmann <namdre.s...@googlemail.com> > *Sent:* Tuesday, April 10, 2018 3:00:19 AM > *To:* Rahimi, Tariq Rahim > *Cc:* Sumo project User discussions > *Subject:* Re: A question about timestep and tau > > Hello, > The value of waitSteps counts the number of simulation steps in which a > vehicle was waiting. So if your vehicle waits for 3 seconds and you > simulation with --step-length 0.2 that would be 15 waitSteps. > In the latest development version, the attribute waitSteps is replaced > with waitingTime which is measured in seconds. ( > http://sumo.dlr.de/wiki/ChangeLog#Git_master > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_ChangeLog-23Git-5Fmaster&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=WFYrbGGcPNeSYHOh2KWsVWWO3Zdu-Yc8HIH8OxM9TG4&s=pxZRu4YuCEwEuwWk0S20Sc4c4N1nUWfSyE6vtpXjt7Q&e=> > ). > > The value of tau determines the desired time-headway between successive > vehicles. The exact usage of this value depends on the car following model > (see http://sumo.dlr.de/wiki/Definition_of_Vehicles,_Vehicle_Type > s,_and_Routes#Car-Following_Models > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_Definition-5Fof-5FVehicles-2C-5FVehicle-5FTypes-2C-5Fand-5FRoutes-23Car-2DFollowing-5FModels&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=WFYrbGGcPNeSYHOh2KWsVWWO3Zdu-Yc8HIH8OxM9TG4&s=ReunekgtCFa-RhcSIXd0kvHxyEyDHtxhdFyogahxqlU&e=> > ) > > To model different perception-reaction times, see > http://sumo.dlr.de/wiki/Car-Following-Models#Model_Parameters > <https://urldefense.proofpoint.com/v2/url?u=http-3A__sumo.dlr.de_wiki_Car-2DFollowing-2DModels-23Model-5FParameters&d=DwMFaQ&c=heEcP2AsrLOv4XP8e7I9NA&r=hcDhabDH71qjaXA3guxceND6Pl-jLmH9TuxEWZxKw1xUdKLCB6do1p6Q6bjgl8Fe&m=WFYrbGGcPNeSYHOh2KWsVWWO3Zdu-Yc8HIH8OxM9TG4&s=BL5SFhMbMbhdbrBaFVX7lFagcvGK1aOtCHt_MpQ2RKc&e=> > > regards, > Jakob > > > > 2018-04-10 2:50 GMT+02:00 Rahimi, Tariq Rahim < > tariqrahim.rah...@rockets.utoledo.edu>: > > Hello everyone, > > > When I output the tripinfo, it says waitSteps= an integer value. How can I > get this or the total waiting time for each vehicle in seconds? Also, how > can I calculate a queue length? > > > What is the concept of time Step? when I generate a route file with 12 > vehicles departing at the same time step but in different time frame, such > as the first vehicle departs at 0 seconds, the second at 3rd second, the > third one in 6th second but they all are departing at the same time step. > Here, the time step in 9 seconds. 10 minutes later, there are 5 vehicles > departing at the same time step and the time step there becomes 5 seconds. > > > What can I make of time step if I want to calculate the waiting time at an > intersection? > > > Also, any ideas on what does tau trigger? what file can I find it's source > code and what functions are related to it? I want to simulate different > perception-reaction times (0.5 second, 1 second, 2 seconds), How should I > go for it? > > > Thank you, > > > * ------------------------------------- Tariq R Rahimi* > Graduate Student > > > > >
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