Re: [sumo-user] [Questions] density calculation in Lane- or Edge-based T

[Yiran Zhang <yiranz94@xxxxxx>]

Thanks Jakob!

Best,

Yiran

On Tue, Jan 3, 2023 at 11:52 PM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

density is averaged over time and space:

density = sampledSeconds / period * 1000 / length

where length is m and sampledSeconds is the number of vehicle-seconds registered during the recording interval.

10 sampledSeconds could be 1 vehicle observed for 10 seconds during the aggregation period or 10 vehicles observed for 1 second each.


Am Di., 3. Jan. 2023 um 21:05 Uhr schrieb Yiran Zhang <yiranz94@xxxxxx>:

Hi all,

We are trying to use the density data from the Lane- or Edge-based traffic measures to conduct transportation research. May we know if we can have more detailed information about how SUMO calculates the density based on the Lane- or Edge-based Traffic Measures? In the official it says '#veh/km', but we would like to know what the '#veh' is targeted at. Do you mean the veh passing through the lane during the given time period, or the number of veh present on the lane?

Thanks and Best Regards,

Yiran

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Best regards,

Yiran Zhang

Graduate Student

intelligent Urban Transportation Systems (iUTS) Lab

Department of CEE 

University of Washington

Email: yiranz94@xxxxxx