Cadyts usage - Githubissues

eclipse-sumo / sumo

Eclipse SUMO is an open source, highly portable, microscopic and continuous traffic simulation package designed to handle large networks. It allows for intermodal simulation including pedestrians and comes with a large set of tools for scenario creation.

https://eclipse.dev/sumo

Eclipse Public License 2.0

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Cadyts usage #14213

Closed nudtdyk closed 6 months ago

nudtdyk commented 6 months ago

Add your issue description here. Hi, after building a traffic scene using SUMO, I want to calibrate the traffic flow in the scene using real data.

If possible, upload an example that shows your problem. I found through research that the Cadyts tool in SUMO can achieve this functionality. However, when I looked at the official documentation, I found that the examples were not very detailed, as shown below:

I'm not sure how to use the existing real data, such as the parameters in the <REALFLOWS>-file, as I don't know the specific meanings of these parameters.Can you give me more details？Thanks. SUMO-version: SUMO 1.19.0 operating system: Windows10

m-kro commented 6 months ago

The <REALFLOWSFILE> ist just the XML representation of your real measurement data. You can study the example file in the docs to see which attributes it contains:

edge of the measurement
time interval of the measurement
measured value and standard deviation
measurement type should be COUNT_VEH for vehicle counts

You should be able to convert your data into such a format as long as you have counted vehicles passing a section.

nudtdyk commented 6 months ago

Thank you for your response. I am puzzled by the following points: 1、How is the "link" defined in "singlelink link="1to21""? Is it the ID of two edges? 2、What do "measured value" and "standard deviation" specifically refer to, and how are they determined? 3、In SUMO, isn't the default type passenger cars? Is the "COUNT_VEH" property independent? If you have a simple example, could you please provide me with a reference? Thank you very much.

m-kro commented 6 months ago

Please read carefully. Cadyts is a contributed tool and as such does not follow the SUMO terms exactly.

Link means edge and the given ID is just an example of an edge ID. Probably the ID contains the connected node IDs in this case, but that is not important.
"measured value" could be the vehicle count. It seems Cadyts knows more types of measurements, but here only the vehicle count is given. Nevertheless, you have to tell Cadyts what type of values you give as input by the attribute "type" as shown.

nudtdyk commented 6 months ago

Thank you for your patient explanation. I apologize for disturbing you.