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Re: [sumo-user] save simulation state

Maria,

Thanks for your reply!
If I have 3000000 vehicles in my simulation scenario, the suggested Traci command is going to set a parameter for each vehicle, like

  • use Traci to find a list of vehicles is running and are going to insert in the simulation,
  • set a new rerouting period for these vehicles.
  •    
I am wondering, is it a time-consuming one? 

Are there some other methods I could do it quickly and easily?


Best regards,

Jane


On Tue, Sep 8, 2020 at 3:26 AM <Maria.Armellini@xxxxxx> wrote:

Hi Jane,

 

I think you could do it using Traci. You can start the simulation with high values for “device.rerouting.period” and “device.rerouting.pre-period” to avoid rerouting vehicles before time 1800 s. At simulation time 1800s you can change the “device.rerouting.period” value of specific vehicles with the command:

 

traci.vehicle.setParameter("vehicle ID", "device.rerouting.period", "period")

 

See https://sumo.dlr.de/docs/Demand/Automatic_Routing.html#traci and https://sumo.dlr.de/docs/TraCI.html for more information.

 

Sumo can generate different types of measures, in the following link you can find information about them https://sumo.dlr.de/docs/Simulation/Output.html.

 

Regards,

Giuliana

 

 

From: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] On Behalf Of Jane Cheung
Sent: Montag, 7. September 2020 19:55
To: Sumo project User discussions
Subject: [sumo-user] save simulation state

 

Dear all,

If I have a simulation with 3600s，

the configuration file is below :

-----------------------------------------------------------------


    <input>
        <net-file value="mycase.net.xml"/>
        <route-files value="mycase.rou.xml"/>
    </input>

    <output>
        <summary-output value="output\mycase.summary.xml"/>
        <tripinfo-output value="output\mycase.tripinfo.xml"/>
<tripinfo-output.write-unfinished value="true"/>
    </output>

    <time>
       <begin value="0"/>
       <end value="36000"/>
    </time>

    <routing>
        <device.rerouting.probability value="1"/>
        <device.rerouting.period value="300"/>
        <device.rerouting.pre-period value="300"/>
    </routing>

<processing>
       <ignore-junction-blocker value="20"/>
       <time-to-teleport value="75600"/>
       <max-depart-delay value="3600"/>
       <routing-algorithm value="dijkstra"/>
    </processing>

 

-----------------------------------------------------------------

 

I want to evaluate different rerouting algorithms in SUMOs from 1800s to the 3600s.  In order to do that, I hope the traffic condition from 0-1800s in different tests are the same, and the rerouting-device in each vehicle can only work from the 1800s to 3600s

Could I save the simulation state at 1800s and try different simulations from 1800-3600 with different route algorithms?

Could I save one simulation state of SUMO? Or Could I use some other ways to realize my purpose?

 

Appreciated in advance, and looking forward to getting your suggestions.

 

Best regards,

Jane

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