Hi Jaime,
that's difficult to guess without knowing more about your scenario. Did you
check whether the buses are inserted at the route begin at all? Maybe there
is a spillback queue or many other vehicles want to enter the simulation at
the same place, such that SUMO cannot place new vehicles on the road
safely. If your network is too big to do this manually, think of placing a
detector
<https://sumo.dlr.de/docs/Simulation/Output/Induction_Loops_Detectors_%28E1%29.html>
(with attribute vTypes="vehDist_IDM_bus") at the route begin or adding FCD
output <https://sumo.dlr.de/docs/Simulation/Output/FCDOutput.html> to your
bus vehicle type to get relevant output for further diagnosis.
Mirko
-----Original-Nachricht-----
Betreff: [sumo-user] Modelling two bus lines of equal frequency
Datum: 2022-07-25T18:59:30+0200
Von: "Jaime Moya" <[email protected]>
An: "Sumo project User discussions" <[email protected]>
Hi,
I am modelling two bus lines of equal frequency, but different stop times
at bus stops. To avoid buses being inserted at perfect regular times, I am
using probability:
<flow id="517" type="vehDist_IDM_bus" line="517" begin="0.00"
route="Ruta_517" end="4500" probability="0.0015" />
<flow id="518" type="vehDist_IDM_bus" line="518" begin="0.00"
route="Ruta_518" end="4500" probability="0.0015" />
However, in many scenarios I am obtaining big differences in the number of
simulated buses of one line with respect to the other (line 517 vs line
518). For example, the following graph shows the difference (number of 517
buses minus number of 518 buses) for a number of simulated scenarios:
[image.png]
These differences are important because I am getting results with noise. I
don't want to use "vehsPerHour" or "number" because the buses would be
equally spaced. Should I use period [exp(x)]? Doing so would balance the
number of 517 and 518 simulated buses?
Thanks in advance.
Kind regards,
--
Jaime Moya
Pontificia Universidad Católica de Chile
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