The start time of breakdown versus inflows classified by reaction time. (a) Box-plot for pedestrians with medium heterogeneity in reaction time, (b) box-plot for pedestrians with large heterogeneity in reaction time, (c) box-plot for pedestrians with homogeneous short reaction time, (d) box-plot for pedestrians with homogeneous long reaction time, (e) box-plot for pedestrians with two different reaction time.