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There seem to be stronger interaction effects among the input parameters that induce stochasticity in the simulator, as expected. Fixing single sources of stochasticity (starting positions, free-flow speeds, grid variation for optimization, step length variation) individually might not necessarily reduce the variation in the output. As a result, it is complicated to reduce the amount of variability in the output and it might be helpful to analyse the variability in the output before running further studies.