Re: [sumo-user] Vehicle Count Mismatch Issue:

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

The mismatch is most likely due to an uncalibrated distribution of desired speeds. See https://sumo.dlr.de/docs/Definition_of_Vehicles%2C_Vehicle_Types%2C_and_Routes.html#individual_speed_factor

If the section has multiple lanes, than a mismatch in lane changing behavior calibration could also play a role.

Having  a higher density despite matching insertion flow suggests, implies that vehicles are driving slower in the simulation.

This implication conflicts with your reported measurement of the simulation having a higher speed.

This conflict could point to a problem with your methodology of interpreting data from the simulation (or a problem with the simulation output itself).

Am Do., 22. Juni 2023 um 12:31 Uhr schrieb Mayank Singh <mayanksingh.daiict@xxxxxxxxx>:

Respected Sir,

In my simulation scenario, I am inserting the vehicles as per the available dataset, along with their respective "depart speed" mentioned in the dataset. 

The length of the road segment is 420m in my simulation, as per the dataset.

Now, I am counting the vehicles on my road stretch of 420m every minute during the simulation and observing the space-mean speed. 

But this vehicle count does not match the dataset, and the space-mean speed is also higher than the dataset. I am not able to figure out the reason for this vehicle count and space-mean speed mismatch. 

I have also enclosed the graphs for your reference.

Kindly help me rectify this issue.

Regards,

Mayank

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