Table 2. Regression model coefficients and average marginal effects.
| Variables | Probit Coefficient | 95% Confidence Interval | Average Marginal Effect |
|---|---|---|---|
| Access trip distance (miles) | -0.80 | -1.02, -.58 | -0.12 |
| Trip origin (1=home; 0=non-home) | 0.55 | .41, .68 | 0.08 |
| Month (ref.=January) | |||
| February | 0.10 | -.13, .32 | 0.01 |
| March | 0.13 | -.07, .33 | 0.02 |
| April | 0.21 | -.19, .62 | 0.03 |
| May | -0.10 | -.33, .13 | -0.02 |
| June | -0.10 | -.35, .14 | -0.02 |
| July | 0.10 | -.15, .35 | 0.01 |
| August | -0.04 | -.25, .17 | -0.01 |
| September | -0.05 | -.28, .18 | -0.01 |
| October | -0.12 | -.32, .07 | -0.02 |
| November | 0.05 | -.19, .29 | 0.01 |
| December | -0.08 | -.31, .15 | -0.01 |
| Income | 0.02 | -.02, .05 | 0.002 |
| Household size | 0.03 | -.01, .07 | 0.004 |
| Homeowner (1=yes; 0=no) | 0.09 | -.04, .23 | 0.01 |
| Sex (1=male; 0=female) | 0.05 | -.04, .15 | 0.01 |
| Hispanic (1=yes; 0=no) | 0.06 | -.07, .20 | 0.01 |
| Born in USA (1=yes; 0=no) | 0.06 | -.06, .17 | 0.01 |
| Possess driver's license (1=yes; 0=no) | -0.01 | -.14, .13 | -0.001 |
| Currently employed (1=yes; 0=no) | -0.05 | -.16, .06 | -0.01 |
| Disability (1=yes; 0=no) | -0.20 | -.35, -.04 | -0.03 |
| Education (ref.=not high school grad) | |||
| High school graduate | -0.08 | -.24, .08 | -0.01 |
| Some college credit | -0.06 | -.27, .14 | -0.01 |
| Associate or technical school degree | 0.06 | -.20, .33 | 0.01 |
| Undergraduate degree | -0.07 | -.28, .13 | -0.01 |
| Graduate/professional degree | -0.11 | -.32, .10 | -0.02 |
| Age (years) | -0.004 | -.01, -.001 | -0.001 |
| Residence type (ref.=Single family detached) | |||
| Single family attached | 0.01 | -.16, .17 | 0.001 |
| Mobile home | 0.04 | -.42, .51 | 0.01 |
| Building with 2-4 units | 0.03 | -.13, .20 | 0.01 |
| Building with 5-19 units | 0.16 | -.04, .36 | 0.02 |
| Building with ≥ 20 units | 0.17 | -.004, .35 | 0.03 |
| Day of week (ref.=Sunday) | |||
| Monday | -0.04 | -.21, .12 | -0.01 |
| Tuesday | -0.10 | -.27, .07 | -0.02 |
| Wednesday | -0.12 | -.29, .05 | -0.02 |
| Thursday | -0.05 | -.23, .14 | -0.01 |
| Friday | 0.10 | -.12, .33 | 0.01 |
| Saturday | 0.04 | -.21, .28 | 0.01 |
| Number of vehicles at household | -0.05 | -.12, .01 | -0.01 |
| Destination mode (ref.=local bus) | |||
| Express bus | -0.13 | -.34, .08 | -0.02 |
| Premium bus | -0.20 | -.87, .47 | -0.03 |
| Public transit shuttle | 0.66 | -.035, 1.36 | 0.07 |
| Heavy rail | -0.24 | -.38, -.10 | -0.04 |
| Light rail | -0.08 | -.25, .08 | -0.01 |
| Street car | -0.25 | -.59, .09 | -0.04 |
| Trip number | 0.03 | .01, .05 | 0.004 |
| Intercept | 1.51 | 1.11, 1.90 |
Boldface text indicates significant parameter estimates (p≤0.05)