A New Big Data Approach to Understanding General Traffic Impacts on Bus Passenger Delays

Table 1

Definitions and summary statistics of the considered variables.

Variables	Abbrev	Definitions	Mean	Std.	Min	Max
(a) Independent variables used in multiple linear regression (MLR)
General traffic time (s)	GTT	Travel time of the general traffic	373.521	62.251	227.557	1,174.473
Accumulated rainfall (l/m^2)	AR	Accumulated rainfall	0.028	0.179	0.000	6.500
Previous ridership	PR	Number of boardings from the first bus stop (15) to bus stop 269 (included) in line 14 (Figure 1)	35.608	17.061	0.000	125.000
Stream ridership	SR	Number of boardings from bus stop 119 to 127 (included) in line 14 (Figure 1)	26.404	14.883	0.000	112.000
Traffic flow rate (veh/h)	TFR	Traffic flow rate	668.512	215.058	0.000	1,194.444
Inductive loop occupancy (%)	ILOP	Roadway occupancy: Percentage of time that the loop has a vehicle standing over it	5.158	3.060	0.207	41.847
(b) Dependent variable used in MLR
Bus travel time (s)	BTT	Travel time of the bus in the stream	784.919	143.279	329.000	1,892.000