I've created a scenario with 3 replications with a set of seed numbers. whenever I run the simulation model with SUMO default parameters for car-following and lane-changing models for twice and more, I get the same results, as expected.
but the problem is when I try to manually set those parameters to their defaults, the results considerably will change.
these are parameters that I've tried to set it manually to their defaults:
['speedFactor; 1.000', 'speedDev; 0.100', 'minGap; 2.500', 'accel; 2.600', 'decel; 4.500', 'sigma; 0.500', 'tau; 1.000', 'lcSpeedGain; 1.000', 'lcKeepRight; 1.000', 'lcOvertakeRight; 0.001', 'lcSpeedGainRight; 0.100', 'lcAssertive; 1.000']
source:
https://sumo.dlr.de/wiki/Definition_of_Vehicles,_Vehicle_Types,_and_RoutesSUMO version: 1.3.0
also in the source link, it states that the default "lcOvertakeRight" parameter is 0 but if I manually set it to 0 SUMO will raise the error below:
'''
Error: value '0' must be greater than or equal to minExclusive facet value '0'
In file '...\315701.vtype.xml'
At line/column 5/133.
Quitting (on error).
'''
