I have had a look at it. But, as far as I know, I should ask the simulation to get or set the vehicle data one at a time via that module(traci.vehicle). I am looking for a facility to get the flow data at a specific point automatically which I was thinking could be e1 or e2 detector.
That function should return the described value. However,
if no vehicles were on the detector during the last step,
no valid data can be returned, so you get -1 and (). If a
vehicle was on the detector during the last step, the
method will give you the data.
Greets, Menno
On 14-5-2021 10:04, ali mirzaei wrote:
Hi Menno,
This is what the mannaul says: getLastStepMeanSpeed(self, detID)
getLastStepMeanSpeed(string) -> double
Returns the current mean speed in m/s of vehicles
that were on the named e2.
I am looking for a tool by which I can extract the
flow characteristics at the time the vehicle is on the
detector. So, is there any option to get more data of
vehicles in traci.lanearea module?
the e1 detector has no length, I think you should use
an e2 detector if
you want to have a detector that covers an area.
Regarding the functions: when do you call these? I'd
expect -1 and ()
when no vehicles were on the detector during the last
step. So at the
start of the simulation, you will most likely get
those results. And
afterwards if there has been no traffic.
Greets, Menno
On 13-5-2021 23:28, ali mirzaei wrote:
> Hi everyone,
> 1- What is the length of the induction
loop(e1detector)?
> 2- in the case of e2detector, when I generate my
add.XML file consisting of:
> <e2Detector id="e2Detector_1" lane="e2_0"
pos="15.22"
> length="10.00" freq="5" file="e2_det.xml"
friendlyPos="1"/>
> and call the functions:
>
print(traci.lanearea.getLastStepMeanSpeed("e2Detector_1"))
>
print(traci.lanearea.getLastStepVehicleIDs("e2Detector_1"))
> the answer is "-1" and "()".
> Why does this happen?
> Any help would be appreciated.
>
> Regards,
> Ali
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