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Re: [sumo-user] emissions output - normalised value
  • From: Michael Behrisch <oss@xxxxxxxxxxx>
  • Date: Thu, 18 Jun 2020 07:04:24 +0200
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Hi Natalia,
you can read the length of an edge directly from the network or
interactively from the sumo-gui or netedit. Can you share your scenario?
Your interpretation of the units is correct.

Best regards,
Michael

Am 11.06.20 um 09:25 schrieb Natalia Liora:
> Hi Michael, 
> 
>  I notice that in some cases (i.e. for specific edges) the result is different. How the length of the edge is estimated? Does the estimated length of the edge exist in any output of the model?
> 
> Also, the units are given as g/km/hour. In fact,  this correspond to g/ (km*h), right ?
> 
> Thank you!
> Best regards,
> Natalia
> 
>> On 11 Jun 2020, at 10:11 AM, Michael Behrisch <oss@xxxxxxxxxxx> wrote:
>>
>> Hi Natalia,
>> can you please give an example, because it should be exactly as you stated.
>> If you have an interval length of one hour, dividing the absolute emissions
>> by the edge length should give the normalized emissions.
>>
>> Best regards,
>> Michael
>>
>> Am 2020-06-11 00:46, schrieb Natalia Liora:
>>> Hi,
>>> In SUMO documentation the definition of normalised emissions is given
>>> (https://sumo.dlr.de/docs/Simulation/Output/Lane-_or_Edge-based_Emissions_Measures.html)
>>> It is referred that normalised emissions are the emissions during this
>>> interval normed by time and edge length (g/km/hour).
>>> In case I divide the absolute values (in mg)  with the edge of the
>>> length (during one hour) I do not get the normalised values.  Could
>>> you please clarify how normalised emissions are estimated and what
>>> exactly represent?
>>> Thank you
>>> Natalia
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>

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