Re: [sumo-user] harmonicMeanSpeed, flow, Calibrator

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

1) upgrade to version 1.2

2) Vehicles are equally spaced in time, as long as there is enough (safe) space for insertion. It helps to set departSpeed="max" because then vehicles can adjust their insertion speed so that the gaps are used most efficiently. For keeping a constant vehicle number, see https://sumo.dlr.de/wiki/FAQ#How_do_I_maintain_a_constant_number_of_vehicles_in_the_net.3F

3) Calibrators try to avoid insertion until the end of their calibration interval so that vehicles that might still arrive from upstream don't have to be deleted. For long calibration intervals this may introduce artificial clustering of vehicles. It should work fine if you set smaller intervals (e.g. 120s). If that still doesn't work, provide a minimal sample scenario that demonstrates the unexpected behavior.

regards,

Jakob

Am Di., 30. Apr. 2019 um 16:42 Uhr schrieb Ben Redouane <mohamed.berrazouane@xxxxxxxxxxxxxxxxxx>:

Dear Sumo Community,

I am quite a beginner and I have actually three different questions

The first is concerning the "harmonicMeanSpeed" output from Induction loops
that I am not able to generate for unknown reasons

Def:

<inductionLoop id="CV_1" lane="-5005.0.00_0" pos="300" freq="60.00"
file="CV_detInfo.xml" friendlyPos="1" vTypes="CV"/>

Output:
<interval begin="0.00" end="60.00" id="CV_1" nVehContrib="26" flow="1560.00"
occupancy="7.66" speed="28.40" length="5.00" nVehEntered="27"/>


The second is more of a general issue with what "equally spaced" in
vehicular flow means (eg. when using vehsPerHour). I tried to find some sort
of cycles for the distribution by analyzing the resulted flows but I
couldn't find any. So I had to use Calibrators to ensure a constant number
of vehicles on the network as I wanted to simulate different LOS.

And here Comes the Third question regarding how calibrators behave(per
default frequency) knowing that I am applying a per lane calibrator on a 3
lanes motorway with different flows per lane.
As I start my simulation, the first two calibrators start only removing
additional vehicles while the third is doing nothing even if it actually had
no vehicles passing through (shouldn't it insert?). Next, vehicles in the
first two lanes stopped and the 3rd calibrator then start generating some
vehicles and done!

The begin/end periods are the same for all three and the results are always
showing that the first two lanes are well calibrated while the thrid is only
having a 24veh/hour flow which is tooooo low. I just wonder how the
calibrators logic works.

I apologize for these long questionS and thank you for your support! ^^

Sincerely,



--
Sent from: http://sumo-user-mailing-list.90755.n8.nabble.com/
_______________________________________________
sumo-user mailing list
sumo-user@xxxxxxxxxxx
To change your delivery options, retrieve your password, or unsubscribe from this list, visit
https://www.eclipse.org/mailman/listinfo/sumo-user