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Re: [sumo-user] Junction control: behaviour of mutual foes

Hi Jakob,

 

looking at this _expression_: https://github.com/eclipse/sumo/blob/95c3d0dfe8d4c07e1c2204317124b52929f006e0/src/microsim/MSVehicle.cpp#L6067

 

If the first vehicle on the junction should be prioritised, why doesn't it read

return egoET< foeET ? Time is in seconds, so smaller values indicate earlier arrival...?! On the other hand, the result of this change is quite noticeable. I compiled it for the sake of curiosity. Previously, each stream could let pass some vehicles before the other gets its turn. Now, left-turning vehicles wait for a long gap and cross with sometimes going through some fast oncoming traffic...

 

Mirko

 

 

 

 

-----Original-Nachricht-----

 

 

 

 

Hello,
oncoming traffic stops for left-turning traffic (which is waiting on the intersection) because the call to MSLink::getLeaderInfo returns the left-turning vehicle as a potential obstruction and the call to MSVehicle::isLeader confirms that the vehicle has right of way. There is a known issue with the second call in case of junction type "traffic_light_right_on_red" (https://github.com/eclipse/sumo/issues/6068).
 
best regards,
Jakob
 
 

Am Mi., 16. Okt. 2019 um 14:24 Uhr schrieb m.barthauer@xxxxxxxxxxx <m.barthauer@xxxxxxxxxxx>:

Hi all,

 

I suppose this question is directed mainly to DLR developers, but anyway... Can somebody point me to the part(s) in the SUMO source code where the following aspect is decided:

 

When can a left-turning vehicle cross the oncoming traffic, or respectively why does the oncoming traffic stop?

The left-turn link and the opposite straight link are marked as mutual foes. The left-turn originates from an edge with lower priority than the one of the opposite traffic. The signal program shows "priority green / G" for straight and "g" for vehicles turning left.

 

Background: In my simulation, left-turning vehicles pass before the oncoming traffic. In previous episodes, Jakob pointed out that the signal program did not meet some requirements, but I would like to look myself at what is expected...

 

Best regards

Mirko

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