[sumo-user] Number of collisions

[MNY <mehmetnedimyvz@xxxxxxxxx>]

Hello,
I am a new user of SUMO. I created a bottleneck network (first 1km-two lane
and dropping one lane with 1 km length). I would like to observe effects of
replicating autonomous vehicle behaviour under different traffic volumes and
penetration rate of autonomous vehicles.(500 vehicle/hr,1000 vehicle/hr,
2000 vehicle/hr). According to article("Impacts of autonomous vehicles on
the urban fundamental diagram" by Qiong Lu, Tamás Tettamanti, István Varga),
I created two different vehicle types representing Level 0 and Level 5
automation level."type1" represent Level 0, "type2" represent Level 5.

<vType id="type1" carFollowModel="Krauss" accel="2.6" decel="4.5"
emergency-Decel="8.0" tau="1.0" sigma="0.5" length="4.3" minGap="2.5"
maxSpeed="13.89"/>
<vType id="type2" carFollowModel="Krauss" accel="3.8" decel="4.5"
emergency-Decel="8.0" tau="0.6" sigma="0" length="4.3" minGap="0.5"
maxSpeed="13.89"/>

For the 500 veh/hr,1000km/hr traffic volume scenarios, there is a warning
possibility of collision because of tau value is lower than simulation step
size. But there is no collision or teleporting during simulation.

But 2000 veh/hr traffic volume scenarios (in case of %50 level-5 autonomous
vehicles),there is huge number of collision (# collision 4447).

I would like to ask that is my demand modelling have problem or how to good
approach to fix this problem?  I am pasting route  the files at end.

Thank you for helping.

my route file is like below:
<routes>
    <vType id="type1" carFollowModel="Krauss" accel="2.6" decel="4.5"
emergency-Decel="8.0" tau="1.0" sigma="0.5" length="4.3" minGap="2.5"
maxSpeed="13.89"/>
	<vType id="type2" carFollowModel="Krauss" accel="3.8" decel="4.5"
emergency-Decel="8.0" tau="0.6" sigma="0" length="4.3" minGap="0.5"
maxSpeed="13.89"/>
    
	<vehicles>
		<flow id="1" color="red" begin="0" end="3600" vehsPerHour="1000"
type="type1" departLane="random" departSpeed="random" from="L1" to="L2"/>
		<flow id="2" color="green" begin="0" end="3600" vehsPerHour="1000"
type="type2" departLane="random" departSpeed="random" from="L1" to="L2"/>
	</vehicles>
</routes>


 




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