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Home » Proposals » Eclipse Sumo » how to set carFollowModel parameters for sensitivity analysis(can not get sensitivity of some parameters)
how to set carFollowModel parameters for sensitivity analysis [message #1860688] Fri, 25 August 2023 08:56
PEI-JUNG LU is currently offline PEI-JUNG LUFriend
Messages: 1
Registered: August 2023
Junior Member
hello everyone,

I was trying to analyze the parameters sensitivity for different CarFollowModels(Krauss, IDM, IDMM, W99).

When doing sensitivity analysis, we will change each parameter value to see how much it influences the speed of a certain edge.

But there were always some specific parameters that won't influence the simulation result. (ex. delta, stepping in IDM; adaptFactor, adaptTime in IDMM; cc1~cc9 in W99)

Those parameters should be important for the CarFollowModels, so I consider it might be a parameter setting issue. Here is how I set parameters in xml:

IDM:
<routes>
<vType id="0" departSpeed="MAX" maxSpeed="27.50" SpeedDev="0.5" vClass="passenger" accel="0.48750000000000004" decel="4.21875" delta="2.9375" emergencyDecel="6.5625" minGap="1.40625" startupDelay="9.6875" stepping="0.3125" tau="1.6875" CarFollowModel="IDM" jmDriveAfterYellowTime="1"/>
<vType id="1" departSpeed="MAX" maxSpeed="25.00" SpeedDev="0.5" vClass="coach" accel="0.48750000000000004" decel="4.21875" delta="2.9375" emergencyDecel="6.5625" minGap="1.40625" startupDelay="9.6875" stepping="0.3125" tau="1.6875" CarFollowModel="IDM" jmDriveAfterYellowTime="1" color="1,0,1"/>
</routes>


I've tried using traci function like :
traci.vehicle.setParameter(vehicle_id, "delta", deltaValue)
but still doesn't work.

does anyone know where the problem is?

p.s. my sumo version is v1.18
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