Thank you so much for answering. I looked at the source code. While reading the 
code I am also trying to go through your paper ( 
https://elib.dlr.de/93669/1/LNCS_SUMOIntersections.pdf ). Though I need to 
digest it.

However it looks like I am still away from answer. I like to incorporate  SPAT 
(signal phase and timing)  message with traffic light. This information enables 
vehicles to adjust their speed profiles, accelerations and/or decelerations to 
minimize fuel consumption and carbon emissions.

I am not sure where to start from in Sumo. Your thoughts will be appreciated.

Regards,
Santos





From: sumo-user <[email protected]> on behalf of Jakob Erdmann 
<[email protected]>
Date: Tuesday, April 20, 2021 at 11:38 AM
To: Sumo project User discussions <[email protected]>
Subject: Re: [sumo-user] Traffic light and Vehicle Interaction
Hello,
the junction model is spread over
https://github.com/eclipse/sumo/blob/master/src/microsim/MSLink.cpp and
https://github.com/eclipse/sumo/blob/master/src/microsim/MSVehicle.cpp
The interaction pretty simple: vehicles drive at green and stop at red. This 
behavior can be modified via some vType parameters: 
https://sumo.dlr.de/docs/Definition_of_Vehicles,_Vehicle_Types,_and_Routes.html#junction_model_parameters

regards,
Jakob


Am Di., 20. Apr. 2021 um 17:17 Uhr schrieb sjha2 
<[email protected]<mailto:[email protected]>>:
I am very new to Sumo. I am still trying to learn and digest.

I see documentation here ( 
https://sumo.dlr.de/docs/Simulation/Traffic_Lights.html ). It talks about how 
to configure a traffic signal.

However, I could not find how traffic lights and vehicles interact. Your 
pointer to code or documentation will be highly appreciated.
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