[sumo-user] How to get the desired phase from each lane or vehicle_id

[Lourens Pool <L.A.Pool@xxxxxxxxxxxxxxxxxx>]

Hi, 

I hope that I oversaw something. Making this an easy question :)

Question

Is it possible to easily determine the desired_phase_index for any given lane_id or maybe a vehicle_id ?

Ideally I would like to call get_phase(lane_id) and get all phase indexes that have a green light for this lane_id. 

traci.trafficlight.setPhase(desired_phase_index) would then give the green light for that lane_id.

Does SUMO have a built-in function for this ? Or is it easy to retrieve this ? 

I have tried the following function: traci.trafficlight.getControlledLinks(tl_id). Which claims to "return the links controlled by the traffic light, sorted by the signal index". But sofar I could not map this to a desired phase for each lane_id. 

Explanation 

I have attached a screenshot of my network below:

traffic light :  gneJ0  controls lanes:  {'west_in_0', 'west_in_1', 'east_in_1', 'east_in_0', 'south_in_0', 'north_in_0'}

My traffic light has three phases.

I would like to map:

{west_in_0, 'east_in_0'}:    --> Phase 0:  horizontal traffic

{'west_in_1', 'east_in_1'}    --> Phase 2:  horizontal traffic with left turn

{'south_in_0', 'north_in_0'} --> Phase 4:  vertical traffic

Please run python3 runner.py in the attached directory. 

Thanks for your time. 

Best regards, 

Lourens

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