Measuring Retiming Responses of Passengers to a Prepeak Discount Fare by Tracing Smart Card Data: A Practical Experiment in the Beijing Subway

Table 5

Summary of classification indexes.

Dimension	Classification index	Unit	Range of value
travel intensity	travel days per week	days/week
	standard deviation of travel days per week	none
	number of trips per day	trips/day
temporal travel characteristics	start time of the first trip	minute
	standard deviation of the first-trip start times	none
	activity duration per day	minute
spatial travel characteristics	OD coverage rate	none
	trip distance (travel time)	minute