Understanding Attitudes towards Proenvironmental Travel: An Empirical Study from Tangshan City in China

Table 1

The variables and variable value assignment.

Characteristics	Variables/code	Variable assignment
Personal	Gender/G	G = 1, male; G = 2, female
	Age/Ag	Ag = 1, when ≤20; Ag = 2, when (20, 50]; Ag = 3, when >50
	Occupation/O	O = 1~7, civil servant, manager, technician, student, staff, freelancer, others
	Monthly income/M	M = 1, when <2000; M = 2, when ≥2000
	Driver’s license/J	J = 1, no; J = 2, yes
	Bus ID card/P	P = 1, no; P = 2, yes
Family-owned private travel tool	Private car/S	S = 1, no; S = 2, yes
	Bicycle/Z	Z = 1, no; Z = 2, yes
	Electric bicycle/D	D = 1, no; D = 2 when = 1; D = 3 when ≥2
Travel	Purpose/MD	MD = 1~4, commuting, business, shopping and recreation, visiting friends and relatives
	Cost/FY	FY = 1~4, ≤2 Yuan, (2, 5] Yuan, (5, 10] Yuan, >10 Yuan
	Time/SJ	SJ = 1~4, <10 minutes, 10~30 minutes, 30~60 minutes, >1 h
	Distance/JL	JL = 1~4, ≤1 km, (1, 5] km, (5, 10] km, >10 km