Taxi Efficiency Measurements Based on Motorcade-Sharing Model: Evidence from GPS-Equipped Taxi Data in Sanya

Table 3

Notations for Formulas.

Notation	Explanation
	The center of the rectangular coordinate system/The center of the earth
	The location
	The radial distance
	The polar angle
	The azimuthal angle
	The taxi ID
	The time
	The maximum of taxi ID
	The maximum of time
	The location of taxis
	The radius of the earth
	The longitude of the location of taxis
	The latitude of the location of taxis
	The distance between two locations of taxis
	The number of passengers in a taxi
	Total distance between two locations of taxis
	Total occupied distance between two locations of taxis
	Total unoccupied distance between two locations of taxis