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Re: [sumo-user] Demand generation using OD matrix

Hi Jakob,

I tried to load the trips generated by od2trips directly into SUMO but still the routes are similar. I also tried to use Duaiterate with below configuration but while validating the output (edgestatedump) with our validation count data, the correlation results are not good. It is coming in between 0.2-0.3.

Configuration of duaiterate -

"C:\Users\Bhushan\sumo-msvc12x64-git\sumo-git\tools\assign\duaIterate.py" -n "C:\Users\Bhushan\Sumo\2018-06-05-21-00-00\map.net.edited1.xml" -b 109800 -e 118800 -t "C:\Users\Bhushan\Sumo\2018-06-05-21-00-00\Trips\map.trip_June2_AM_scale_0.1.xml" -l 40 --convergence-iterations "5" --max-convergence-deviation "0.5" --pessimism "1".


Please let me know if any more parameters needs to be provided in duaiterate. 


Also, let me restate my problem statement and it will be helpful if you could provide your insights-

As an input, I am taking a network from OSM along with polygon shape files and OD matrix which I am providing to generate trips. We want to run a simulation which is close to real world to compare it with the real world count data on different edges for the same network. As always I appreciate your suggestions and feedback.


Thanks,

Vrinda Khirwadkar

University of Memphis



From: Jakob Erdmann <namdre.sumo@xxxxxxxxx>
Sent: Monday, July 30, 2018 12:23 AM
To: Sumo project User discussions
Cc: Vrinda Khirwadkar (vkhrwdkr)
Subject: Re: [sumo-user] Demand generation using OD matrix
 
When not given any other information, DUAROUTER picks the fastest route under the assumption that the network is empty.
To get better routes you need to perform user assignment.
A quick fix you can try is to load the trips generated by od2trips direclty into SUMO. This way, vehicles will react to traffic conditions at the time of insertion and the routes will be more realistic.
A more elaborate way is explained here: http://sumo.dlr.de/wiki/Demand/Dynamic_User_Assignment

regards,
Jakob


2018-07-30 6:39 GMT+02:00 Vrinda Khirwadkar (vkhrwdkr) <vkhrwdkr@xxxxxxxxxxx>:

Hello SUMO authors,


I have a network and creating trips using OD2trips. It picks an edge ID from a TAZ but OD2trips is generating the vehicles which are mostly on internal roads, they are not generating  from highways/freeways which should be the case in the real world. 

Is there a way that I could assign trips so that the vehicles should generate from highways?


I also tried generating routes using DUAROUTER , but still it is taking the same internal routes.  In order to generate a scenario close to real world, please let me know a way using which we can enforce vehicles to follow highways/freeways rather than internal ways(roads containing traffic signals). Your help is highly appreciated.


Thanks,

Vrinda Khirwadkar

University of Memphis


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