Table 1.
Variable definition and sample statistics.
| Variables | Variable Description | Value set | Mean (±S.D.) / Percentage |
|---|---|---|---|
| Travel time spent on sustainable travel | |||
| The share of riding public transit | The proportions of time spent riding public transit among the total amount of time spent traveling during the survey period | Continuous variable: R+ | 0.19 (±0.33) |
| The share of engaging in active travel | The proportions of time spent engaging in active travel among the total amount of time spent traveling during the survey period | Continuous variable: R+ | 0.19 (±0.30) |
| Time spent online (in minutes) | |||
| Duration of telework | The average amount of time spent on teleworking on the survey days |
Continuous variable: R+ | 60.28. (±132.31) |
| Duration of online shopping | The average amount of time spent on online shopping on the survey days |
Continuous variable: R+ | 10.02 (±20.28) |
| Built environment at the places of residences (census block group level) | |||
| Population density | Persons×1000/sq. mi. | Continuous variable: R+ | 12.31 (±11.28) |
| Job density | Jobs×1000/sq. mi. | Continuous variable: R+ | 12.19 (±44.18) |
| Land use mixture | Entropy variable using the 8-tier employment categories from Census Longitudinal Employer-Household Dynamics (LEHD) 2010 | Continuous variable: R+ | 0.58 (±0.26) |
| Pedestrian-oriented intersections | Pedestrian-oriented intersections/sq. mi. | Continuous variable: R+ | 153.92 (±100.36) |
| Frequency of peak-hours transit services | Aggregate frequency of transit service within 0.25 miles of block group boundary per hour during evening peak period | Continuous variable: R+ | 161.25 (±196.73) |
| Vehicle ownership and household income | |||
| Household income | Categorical variable | ||
| Less than 25k | = 1 if household income >=$0 and <=$24,999; = 0 otherwise |
6.12 % | |
| 25k to 50k | = 1 if household income >=$25,000 and <=$49,999; = 0 otherwise |
12.53 % | |
| 50k to 75k | = 1 if household income >=$50,000 and <=$74,999; = 0 otherwise |
15.96 % | |
| 75k to 100k | = 1 if household income >=$75,000 and <=$99,999; = 0 otherwise |
15.09 % | |
| 100k to 150k | = 1 if household income >=$100,000 and <=$149,999; = 0 otherwise |
25.15 % | |
| 150k+ | = 1 if household income >=$150,000; = 0 otherwise |
25.15 % | |
| Household vehicles per person | Number of household vehicles/Household size | Continuous variable: R+ | 0.71 (±0.44) |
| Other demographics | |||
| Age | Categorical variable | ||
| Young Adults (Age 18–34) | = if age > = 18 and < = 34; = 0 otherwise | 45.38 % | |
| Mid-Aged Adults (Age 35–54) | = if age > = 35 and < = 54; = 0 otherwise | 39.62 % | |
| Older Adults (Age 55–74) | = if age > = 55; = 0 otherwise | 15.00 % | |
| Gender | Categorical variable | ||
| Female | = 1 if female; = 0 if male | 47.32 % | |
| Male | = 1 if male; = 0 if female | 52.68 % | |
| Driver’s license | Categorical variable | ||
| Licensed driver | = 1 if licensed driver; = 0 if non-driver | 95.08 % | |
| Non-driver | = 1 if non-driver; = 0 if licensed driver | 4.92 % | |
| Educational Attainment | Categorical variable | ||
| Less than Bachelor | = 1 if highest grade completed is at most associates degree; = 0 otherwise |
21.00 % | |
| Bachelor | = 1 if highest grade completed is bachelor’s degree; = 0 otherwise |
44.70 % | |
| Graduate | = 1 if highest grade completed is at least a graduate degree; = 0 otherwise |
34.30 % | |
| Race and ethnicity | Categorical variable | ||
| White | = 1 if race White; = 0 otherwise | 70.49 % | |
| Hispanic | = 1 if race Hispanic; = 0 otherwise | 4.21 % | |
| Non-Hispanic others | = 1 if race Non-Hispanic others; = 0 otherwise | 25.30 % | |
| Number of children | Categorical variable | ||
| No child | = 1 if no child; = 0 otherwise | 78.87 % | |
| One child | = 1 if one child; = 0 otherwise | 11.91 % | |
| Two or more children | = 1 if number of children > = 2; = 0 otherwise | 9.22 % | |
| Employment types | Categorical variable | ||
| Full time | = 1 if full time; = 0 otherwise | 80.92 % | |
| Part time | = 1 if part time; = 0 otherwise | 10.86 % | |
| Self-employed | = 1 if self-employed; = 0 otherwise | 8.23 % | |
| Working Hours | Categorical variable | ||
| Less than 20 | = 1 if number of hours typically worked per week < = 20; = 0 otherwise |
7.89 % | |
| 20 to 40 | = 1 if number of hours typically worked per week >20 and < = 40; = 0 otherwise |
44.11 % | |
| More than 40 | = 1 if number of hours typically worked per week > 40; = 0 otherwise |
48.00 % | |
Note: sample size = 3233.