Skip to main content
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [List Home]
Re: [sumo-user] 回复： 回复： travel time
answers below:


weight file generated by sumo is the simulation result
one simulation's result can be another simulation's input?
yes. The output of one simulation can be loaded as input in another simulation.

simulation's input weight file is different with simulation's output weight file,  they just have the same format
yes. Typically, the written weights will be different from the loaded weights.

and the custom weight file's edge element should only contain weight attribute, other attribute like density , speed ... are simulation result, they are invalid in custom edge weight file  right?
when loading a weight file, attributes like speed and density are simply ignored. It is possible to use things like CO2-emissions as weight attribute instead of traveltime.

then i should wirite custom weight file by hand? is there some tools can help me do this . or i should use a simulation's result and delete ohtere invalid attribute just left the weight attribute
Depending on what you need it's typically a good idea to use the simulation output (edgeData) as a starting point and adapt the weight of some edges (i.e. if you want to prevent near a school).

Note, that there are other options for influencing routing behavior and loading weight files is only one of them.
Check here for more confusing options (-:


在2017年12月06日 22:13，Jakob Erdmann 写道：
1) yes. However, sumo can also load incomplete trip/flow files directly (routing is then performed in the simulation)
2) yes
3) sumo
If you do this iteratively you can compute the dynamic user equilibrium: http://sumo.dlr.de/wiki/Demand/Dynamic_User_Assignment

2017-12-06 6:51 GMT+01:00 杜 伟强 <ishadowprince@xxxxxxxxxxx>:
thanks for your answer
there are still some questions
1。 duarouter use incomplete trip/flow file ，net xml file ，weight file and additional file to generate complete route file 。 right？
2  weight is generated from additional  file  with <edgedate>/<lanedata> element。  right？
3 if 2 is right ， which application can use additional file to generate weight file

thank you for help me ：）

发自网易邮箱大师

在2017年12月06日 04:16，Jakob Erdmann 写道：
Hello,
1) the travel time of an edge usually equals it's length divided by it's speed limit. The actual speed of any one vehicle may differ  from the speed limit and thus the travel time may be different as well. See http://sumo.dlr.de/wiki/Simulation/VehicleSpeed
2) the 'stored travel time' of a lane you can see in sumo-gui, is a way to customized the travel time values that are used when re-routing vehicles within the simulation (http://sumo.dlr.de/wiki/Simulation/Routing).

regards,
Jakob

2017-12-05 15:01 GMT+01:00 杜 伟强 <ishadowprince@xxxxxxxxxxx>:

Hello :

I’m getting trouble in travel time.

1 .what is the definition of travel time

2. I see travel these words in user doc

       Usually, each road within a simulation has an assigned travel time based on its length and allowed speed. 

 

but when I right click show parameter in sumo-gui,every lane’s travel time is -1

 

3. how to set travel time in .xml file? I find this parameter is set in weight file. But maybe weight file is generate by additional file. How to generate weight file. Is there an example file? What is the relationship between weight file and additional file

 

I was bothered by these problem so long time.

Any one can help me ?

Thank you so much

发送自 Windows 10 版邮件应用

 


_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://dev.eclipse.org/mailman/listinfo/sumo-user



_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://dev.eclipse.org/mailman/listinfo/sumo-user



_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://dev.eclipse.org/mailman/listinfo/sumo-user


Back to the top