Re: [sumo-user] calibrator function

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hello,

the calibrator has two functions (which can be combined)

- inserting / removing vehicles (if it's flow elements use the vehsPerHourAttribute)

- changing the speed limit on the edge (if it's flow elements use the speed attribute).

In your example only speed is used so the calibrator never inserts or removes vehicles (and thus the maxSpeed attribute in the calibrator flows is never applied).

The flow elements in your route files likely do not work the way you expect them to for the following reasons:

- vehicles are inserted with speed 0 (set departSpeed="max" to fix this).

- vehicles are inserted only on the rightmost lane (set departLane="random" or "free" to fix this)

If you want to use calibrators, you would typically just define a single flow (with some base level of traffic) and then use the calibrator to add or remove vehicles and thus calibrate the flow.

regards,

Jakob

Am Do., 16. Jan. 2020 um 03:28 Uhr schrieb wangwenxuan <wangwenxuan@xxxxxxxxxxxxx>:

Hello,

I want to ask a question about Calibrator. I build a small project to test the function of Calibrator, but the result shows that the calibrator even had a negative effect on this. So, I’m here to ask whether I use Calibrator in the right way. I simulated a highway based on the traffic flow and speed collected by induction loops. The collected flow data can be seen in train.roul.xml, and the speed data is shown in Calibrator.xml. I tried the calibrator in order to decrease the difference between the measured data and simulation data from the detector, but it didn’t work. So, I want to ask if I did something wrong. Thank you very much.

Best regards！

Wenxuan Wang

	wangwenxuan
wangwenxuan@xxxxxxxxxxxxx

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