Problem here is that both lights work “additional” so an “g” for straight also 
means “g” for the turning cars even if the arrow is yellow or switched off. If 
The arrow is switched on green This would mean “G” regardless of the state for 
the straight cars.

I probably can split up the signal for the lane to have separate signals for 
each direction, as you suggested, an make the turning signal the result of both 
signals.

Thanks for the help


From: sumo-user <[email protected]> On Behalf Of Jakob Erdmann
Sent: Friday, November 5, 2021 9:36 AM
To: Sumo project User discussions <[email protected]>
Subject: Re: [sumo-user] Switchable right-turn arrow on traffic lights

Per my understanding of the German StVO, the switchable arrow indicates a 
conflict free traversal of the indicated direction.
In your case, this should be modeled with 'G' state for the right turn 
(followed by a 'y' and 'r' state).
Since each turning movement can have it's own signal in SUMO there is no 
problem with having the straight traffic keep their 'r' state for the duration.

regards,
Jakob

Am Fr., 5. Nov. 2021 um 09:15 Uhr schrieb 
[email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>>:
Hello,
I am using a SUMO Network with multiple traffic lights that are using 
switchable green and yellow right-turn arrows.
Something like this:
https://www.muenchen.de/rathaus/.imaging/mte/lhm/generic-lightbox-image/dam/Home/Stadtverwaltung/Kreisverwaltungsreferat/fachspezifisch/HA-III/Bilder/verkehrssteuerung/abbiegepfeile/links-rechts/0-pfeile/jcr:content/0-Pfeile.jpg

I could not find a good solution yet in the SUMO traffic lights documentation. 
As a workaround I am using the "s" option which represents the not switchable
'green right-turn arrow'. But with this the vehicles are always stopping and 
are not using the actual priority they have to pass the junction. This slows 
down the traffic flow significantly.

Is there a better way to represent this in SUMO?

Thanks in advance for your support and best regards


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