Hi everyone,
I am doing traffic modeling with VISSIM 10 and the COM interface. I am writing some Python scripts to run VISSIM simulations, implement some scenarios and controls, and collect data. In one step of my code, I need to collect the traffic flow measured by data collection groups and here is what I did:
vs = com.Dispatch("VISSIM.Vissim.1000")
dc = vs.Net.DataCollectionMeasurements.ItemByKey(DataCollectionGroup_ID)
flow = dc.AttValue('Vehs(Current,Max,All)')
The result is always "None" and I got really confused. I pretty much followed the sample code provided by PTV. One possible reason I can think of is that I am running single step simulation but the sample code runs continuous simulation. I run single step because I need to apply something at certain time during the simulation and I prefer not to change it.
Appreciate for any help or suggestions and thank you in advance.
you need to go configurations and highlight all the vehicle classes, then you can see the flow data.
even you can change the interval times
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