Figure 5
From: Universal patterns in passenger flight departure delays
(A) (a) The average absorption time L vs. the estimated shift parameter β1 as obtained from empirical data pertaining to the 6 Model 1 airlines (circles). We observe a linear relationship of the form (14) with a slope of K = −0.13 (solid red line). Airline HA is excluded from the fit, due to its distinctive operation style, as compared to the other five airlines (see main text). (b) L vs. β1 for the 8 Model 2 airlines, exhibiting a slope of K = −1.32. Here VX is an outlier, likely due to the fact that it has fewer data points compared to all other airlines. (B) Number distributions NB1(l) of delayed flights in 8 airlines are biased to the side with l < λ. Histograms are assigned with equal width \(\varDelta l=\frac{1}{4}\lambda \). Arrows indicate the positions of critical value λ separating the dominant range of the propagation factor from those of ITPD and non - propagation factors for airlines B6, VX, UA, US, WN, EV, FL and OO, respectively. The functions NB1(l) means the delayed flight number caused by the propagation factor based on direct counting of flights with longer delays of immediately preceding flights than the current ones.
