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[sumo-user] E2 detector: nVehSeen is negative?
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Hello,
I have a puzzling problem: When simulating a network equipped with E2 detectors, at least one of those detectors gives me negative "nVehSeen" values:
[...]
<interval maxVehicleNumber="0" meanVehicleNumber="0.00" startedHalts="0.00" intervalHaltingDurationSum="0.00" maxIntervalHaltingDuration="0.00" meanIntervalHaltingDuration="0.00" haltingDurationSum="0.00" maxHaltingDuration="0.00" meanHaltingDuration="0.00" jamLengthInMetersSum="0.00" jamLengthInVehiclesSum="0" maxJamLengthInMeters="0.00" maxJamLengthInVehicles="0" meanMaxJamLengthInMeters="0.00" meanMaxJamLengthInVehicles="0.00" maxOccupancy="0.00" meanOccupancy="0.00" meanTimeLoss="-0.00" meanSpeed="-1.00" nVehSeen="-11" nVehLeft="1" nVehEntered="0" sampledSeconds="0.00" id="701057" end="100.00" begin="99.00"/>
[...]
and in fact the cumulative nVehEntered value is lower than the nVehLeft count for the whole simulation (low traffic, only 159 vs. 173 vehicles). My first explanation was that some vehicles are only partially hitting the detector due to lane change, but the detector is relatively short so this phenomenon is rather unlikely.
Is this a bug or an E2 feature?
Jan
