Yes. Halting vehicles and jammed jammed vehicles are synonymous in the
context of the E2 detector.

Am Mi., 16. Nov. 2022 um 18:37 Uhr schrieb yu tang <[email protected]
>:

> Hi Jakob,
>
> Thanks for your reply. How can I address it if I want to have access to
> the distance from the start of the first jam to the end of the last jam? I
> have noticed the speed threshold for lane area detectors, which has
> something to do with halting vehicles. Is it also related with jam? How
> dose SUMO determine whether a vehicle is in jam? Possibly I can set a high
> threshold so that vehicles in low speed between jams can be recognized to
> be in jam as well.
>
> Best,
> Yu
>
>
>
> Jakob Erdmann <[email protected]> 于2022年11月15日周二 08:52写道:
>
>> if the detector is long enough It can have more than one distinct jam at
>> the same time. Thus the sum of jam lengths will be different from the
>> maximum.
>>
>> Am Di., 8. Nov. 2022 um 01:22 Uhr schrieb yu tang <
>> [email protected]>:
>>
>>> Hi all,
>>>
>>> I am using lane area detectors to measure queue length at on-ramps that
>>> are regulated by ramp meters. I set both the simulation step size and the
>>> period of lane area detectors equal to one second. It is not surprising to
>>> find that "meanMaxJamLengthInMeters" and "maxJamLengthInMeters" have the
>>> same values, but it is confusing to find that "jamLengthInMetersInSum" can
>>> have different values. In my opinion, it should have the same values
>>> since the simulation step size is equal to the period of lane area
>>> detectors.
>>>
>>> Besides, I also tried to access the queue length via Traci. The method
>>> getJamLengthMeters() of lane area detectors provides the values that the
>>> same as "jamLengthInMetersInSum" does.
>>>
>>> Can anyone explain the differences between "jamLengthInMetersInSum" and
>>> "maxJamLengthInMeters" when both the simulation step size and the period of
>>> lane area detectors are equal to one second?
>>>
>>> Best,
>>> Yu
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