Exploring Transit Use during COVID-19 Based on XGB and SHAP Using Smart Card Data

Table 2

Description and descriptive statistics of the preprocessed data.

Variable	Category	Count (ratio, %)	Mean
Transit use (choice)	0: given-up transit use	3,415,358 (42.7)	—
	1: transit use	4,780,953 (58.3)	—
	Total	8,196,311 (100.0)	—
Number of O-D trips	Number of trips from origin to destination	—	63.6
Difference between the number of O-D trips	Difference between number of O-D trips before and during COVID-19 pandemic	—	44.7
Number of transfers	Number of transfers from origin to destination	—	0.35
Travel time (minutes)	Travel time from the origin station to the destination station	—	27.5
Fare (KRW)	Fare from origin station to destination station	—	1,111
Departure time (hour)	User’s first tap-in time	—	13:46
Arrival time (hour)	User’s final tap-out time	—	14:14