| Re: [sumo-user] SUMO Simulation: Vehicle Count Discrepancy |
Just in case you didn't find the page by yourself: We have some general paragraphs about road capacity in the documentation. Maybe you get some more advice there. Please note that the number of inserted vehicles depends on the time step length as well (only one vehicle can be inserted per lane and time step).
Best regards
Mirko
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Betreff: Re: [sumo-user] SUMO Simulation: Vehicle Count Discrepancy
Datum: 2023-11-23T14:59:42+0100
Von: "Simon Michael" <simongeb145@xxxxxxxxx>
An: "Mirko Barthauer" <m.barthauer@xxxxxxxxxxx>
It is simply because your network already ends there and the vehicles leave it shortly after being inserted. What if you add another edge downstream?
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Betreff: Re: [sumo-user] SUMO Simulation: Vehicle Count Discrepancy
Datum: 2023-11-23T07:06:36+0100
Von: "Simon Michael" <simongeb145@xxxxxxxxx>
An: "Mirko Barthauer" <m.barthauer@xxxxxxxxxxx>
Dear Mirko,
I still have a problem with the Simulation. I set it departPos to "last", but in the simulation vehicle only appears at the end of the road. Also, the FCD output is not realistic. It shows 2500 vehicles with no acceleration and discontinuous time values. Any suggestions on how to fix this please? I am sending a video of the simulation, the route file, and a screenshot of the FCD output.
Kind Regards
On Wed, Nov 22, 2023 at 4:09 PM Mirko Barthauer <m.barthauer@xxxxxxxxxxx> wrote:If it is about inserting the maximum of vehicles, then please use the flow attribute departPos="last". Maybe look at our FAQ section which contains similar topics #1 #2.
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Betreff: Re: [sumo-user] SUMO Simulation: Vehicle Count Discrepancy
Datum: 2023-11-22T13:23:10+0100
Von: "Simon Michael" <simongeb145@xxxxxxxxx>
An: "Mirko Barthauer" <m.barthauer@xxxxxxxxxxx>
Thank you for your feedback, Mirko. Just I need to insert all the vehicles in the simulation to create congestion.
I have set the departSpeed to 10 m/s and the traffic volume to 2400 vehicles per hour, but only 1400 vehicles were simulated.
Do you have any suggestions on how to create congestion, please?
Kind Regards
On Tue, Nov 21, 2023 at 4:39 PM Mirko Barthauer <m.barthauer@xxxxxxxxxxx> wrote:Hi Simon,
It may be that not all vehicles could be inserted. The volume this is close to what is considered the capacity of a single lane (with default parameters). The capacity can be reached only under certain conditions, one being speed. If you insert the vehicles with speed v=0, they need time to accelerate which makes you lose capacity. Define the departSpeed attribute of your flow to change this.
Best regards
Mirko
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Betreff: [sumo-user] SUMO Simulation: Vehicle Count Discrepancy
Datum: 2023-11-21T13:40:15+0100
Von: "Simon Michael via sumo-user" <sumo-user@xxxxxxxxxxx>
An: "Sumo project User discussions" <sumo-user@xxxxxxxxxxx>
Hello Everyone,
I am working on a SUMO simulation with one lane and a traffic flow rate of 1800 Veh/hr. The simulation duration is one hour (3600 seconds) and I generated FCD output. However, the number of vehicles simulated is less than the traffic flow. Only 1200 vehicles were simulated. Can anyone help me with this issue, please? I have attached my cfg file. Thanks
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Simon MichaelRoad and Transport EngineerTell:+8613194998145
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Simon MichaelRoad and Transport EngineerTell:+8613194998145
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Simon MichaelRoad and Transport EngineerTell:+8613194998145