[sumo-user] Multi-entry/exit detectors in TraCI

[Didac Busquets <didac.busquets@xxxxxxxxxx>]

Hi,

 

I’m trying to use multi-entry/multi-exit detectors with TraCI and I’m getting strange results.

 

I want to use them to count how many vehicles take each turn on a junction.  I have defined one E3 detector with the entry one one lane approaching a junction and exit on one lane on the other side of the junction. I’ve also defined a second E3 detector with entry in the same lane as the first one and exit on another lane:

 

<additional xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://sumo.dlr.de/xsd/additional_file.xsd">

    <e3Detector id="e3Detector_0" pos="2459.46,3350.14" freq="900.00" file="e3Detector_0.xml">

        <detEntry lane="32116245#3_0" pos="119.86"/>

        <detExit lane="32116250#0_0" pos="2.33"/>

    </e3Detector>

    <e3Detector id="e3Detector_1" pos="2462.18,3351.07" freq="900.00" file="e3Detector_1.xml">

        <detEntry lane="32116245#3_0" pos="118.36"/>

        <detExit lane="32116247#0_0" pos="1.81"/>

    </e3Detector>

</additional>

 

However, when I use getLastStepVehicleIDs on each of the detectors, I get the same result:

 

libsumo.multientryexit.getLastStepVehicleIDs('e3Detector_0')

('37', '56', '57')

 

libsumo.multientryexit.getLastStepVehicleIDs('e3Detector_1')

('37', '56', '57')

 

How can it be the all vehicles have gone through 2 detectors if they have the exit point in different lanes (of different edges)? Am I interpreting wrongly what getLastStepVehicleIDs “Returns the list of ids of vehicles that have been within the named multi-entry/multi-exit detector in the last simulation step” means?

 

Thanks,

 

               Didac

 

 

			Didac Busquets / Co-Founder and Chief Scientist didac.busquets@xxxxxxxxxx / +44 (0) 7919 076 981 Immense Simulations Limited Studio J2, Witan Studios, 279 Witan Gate, Central Milton Keynes, MK9 1EJ w3w: ourselves.depend.backpack www.immense.ai
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