Hi Jakob,

 

Thanks a lot for your reply! I tried the second option,
i.e., control the simulation via the TraCI. The example simulation runs perfect 
matching my requirements. However, I have some questions regarding runner.py in 
the tutorial.

 

Why does traci.trafficlights.setPhase("0", 2) set
green for the direction of EastWest?

Why does traci.trafficlights.setPhase("0", 3) set
green for the direction of NorthSouth?

 

The following is the XML definition for the traffic light. I
understand that g is green, r is red etc. But I am confused the meaning of put
GrGr together. I read through the online tutorial but cannot find the clear
explanation about the phase of traffic light on
http://sumo.dlr.de/wiki/Simulation/Traffic_Lights#.3Cphase.3E_Attributes

 

Could you please give me a more explicit definition about
the phases?

 

    <tlLogic
id="0" type="static" programID="0"
offset="0">

        <phase
duration="31" state="GrGr"/>

        <phase
duration="6" state="yryr"/>

        <phase
duration="31" state="rGrG"/>

        <phase
duration="6" state="ryry"/>

    </tlLogic>

 

Thanks again,

Guangyu                                                                         
          
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