Dear Fellow SUMO Users,

Please, I am completely new to SUMO and traci4matlab.

I have a project I have to work on, traffic light optimization. I would
like to use

 waiting time and queue length for this purpose. I had wish to be able to
address

each traffic light on a three lane edge, but it seems it is not allowed.
Also, from

traci4matlab, I wish to retrieve the waiting time for a vehicle using

 traci.vehicle.subscribeContext(awaitingVeh, '0xa4', 85,
{'0x40','0x42','0x43','0x5b','0x51','0x56','0x7a'}, 1, 100) where start=1,
end=100 and awaitingVeh =  'veh13357'
I got the following error message.

"Error using vehicle.subscribeContext

Argument 'vehID' failed validation ischar."

I need help please

Thanks in advance

Babangida Zachariah
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