Dear all,
I am running a merge scenario of two highway lanes that merge into one.
I have two flows of cars that are defined in *.rou.xml file (the content of the
file is below).
I have 2 types of cars that are born on the top lane:
* "Human1" with vehsPerHour=1800
* "Controlled" with vehsPerHour=200
There is 1 type of cars that is born on the bottom lane:
* "Human0" with vehsPerHour=500
So the total flow in the top lane is 2000 vehsPerHour. I work with a time step
of 0.5[sec].
The theoretical rate that I expect to have the cars born is 3600/2000 =
1.8[sec]. so due to the discretization I expect to have the cars born each 1.5
or 2 sec.
However, I run a 750[sec] long simulation (1500 time steps) and I realized that
the rate of the cars that are born is inconsistent with the rate that I want.
* In the first ~100 seconds, the cars are born each 1.5 to 2.5 sec (very
few cars are born each 1.5 sec, most of them at each 2sec, and some at 2.5sec)
* When the simulation progresses, the rate is decreased -> the time at
which new vehicles are born becomes longer, each 3-3.5 sec and even longer.
I am trying to understand why I can't get the cars born at the desired rate.
Thanks,
Sharon
The is the routes.rou.xml file
<routes>
<route id="left" edges="left right"/>
<flow id="human1" route="left" type="human" begin="2"
departLane="1" departSpeed="10" maxSpeed="30" end="90000" vehsPerHour="1800"/>
<flow id="human0" route="left" type="human" begin="2"
departLane="0" departSpeed="7.5" maxSpeed="30" end="90000" vehsPerHour="500"/>
<flow id="Controlled" route="left" type="Controlled" begin="2"
departLane="1" departSpeed="10" maxSpeed="30" end="90000" vehsPerHour="200"
color="1,0,0"/>
</routes>
This is a screenshot of the simulation, vehicles are born on the left hand
side, and drive towards the right hand side.
At t= 42.5[sec]
[cid:[email protected]]
At t= 199[sec]
[cid:[email protected]]
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