Continuous Variable	Description	Mean	S.D.	Min	Max	Percent	Sample Size
Trip Frequency	The number of trips during a day, in count	4.74	3.31	1.00	18.00		569
Income	Individual annual income, in K$	77.5	85.39	0.00	250.00		597
Discrete Variable
Car Owned*	If the respondent owns a car 1; else 0					81.10%	762
Car Reduced*	If the respondent had a car reduced during the past three years 1; else 0					16.67%	762
Millennial*	If the respondent is aged 18 to 34, 1; else 0					26.96%	738
Gender	If the respondent is a male, 1; else 0					54.46%	762
White*	If the respondent’s race is white, 1; else 0					52.65%	718
Asian*	If the respondent’s race is Asian, 1; else 0					24.93%	718
In/Out SF*	If the respondent lives in San Francisco County, 1; other counties in SF Bay Area 0					50.13%	762
Speed*	If the respondent’s stated reason for driving is faster access when compared with alternative modes, 1; else 0					77.28%	471
Trip Chain*	If the respondent’s stated reason for driving is that he/she has multiple stops during a trip, 1; else 0					40.34%	471
Load*	If the respondent’s stated reason for driving is that he/she carries something or travels with children, 1; else 0					63.38%	471
TNC Use	If the respondent does not use TNCs, 1;					59.19%	762
	If the respondent rarely uses TNCs, 2;					20.34%	762
	If the respondent uses TNCs monthly, 3;					8.53%	762
	If the respondent uses TNCs weekly, 4;					10.24%	762
	If the respondent uses TNCs daily, 5					1.71%	762
Sample Selection Variable (reasons for car reduction during the past three years)
Parking Cost*	If the respondent reduced the number of cars because parking is insufficient or expensive, 1; else 0					13.39%	127
Car Cost*	If the respondent reduced the number of cars because car ownership is expensive, 1; else 0					18.90%	127
Life Event*	If the respondent reduced the number of cars because he/she moved or experienced other life events (marriage, school, divorce, etc.), 1; else 0					12.60%	127
Rare Use*	If the respondent reduced the number of cars because he/she rarely drives or he/she has physical constraints, 1; else 0					27.56%	127
Old & Broken Cars*	If the respondent reduced the number of cars because the car was old, broken, or stolen, 1; else 0					25.20%	127