| | Factor | Variable name | values | Definition | Variables |
| | Transport | Car | 0,1 | For (t-2),(t-1),t year, if (passenger car is used) 1, otherwise 0 | Dependent variable | | Lcar | 0,1 | Lagged variable of car variable | independent variable | | Transit | 0,1 | For (t-2),(t-1),t year, if (transit is used) 1, otherwise 0 | Dependent variable | | Ltransit | 0,1 | Lagged variable of transit variable | independent variable | | Non-motor | 0,1 | For (t-2),(t-1),t year, if (non-motor vehicle is used) 1, otherwise 0 | Dependent variable | | Lnon-motor | 0,1 | Lagged variable of non-motor vehicle variable | independent variable | | Time | Minutes | Travel time | independent variable |
| | Individual | Female | 0,1 | If(gender = female) 1, otherwise 0 | independent variable | | Age | 1,2,3,4,5 | If(age < 30) 1, If(age >= 30 & age < 40) 2 | independent variable | | If(age >= 40 & age < 50) 3, If(age >= 50 & age < 60) 4 | | If(age > = 60) 5 | | Age 20s | 0,1 | If(age < 30) 1, otherwise 0 | independent variable | | Age 30s | 0,1 | If(age >= 30 & age < 40) 1, otherwise 0 | independent variable | | Age 40s | 0,1 | If(age >= 40 & age < 50) 1, otherwise 0 | independent variable | | Age 50s | 0,1 | If(age >= 50 & age < 60) 1, otherwise 0 | independent variable | | Age 60+ | 0,1 | If(age > = 60) 1, otherwise 0 | independent variable |
| | Regional | Seoul_m | 0,1 | If(residence is Seoul metropolitan area) 1, otherwise 0 | independent variable |
| | Economic | Self_emp | 0,1 | If(respondent is self-employed) 1, otherwise 0 | independent variable | | Vehicles | Vehicles | Number of owned vehicles | independent variable | | Income | 1,2,3 | If(household monthly income < 2000$) 1 | independent variable | | If(household monthly income >= 2000$ & household monthly income < 4000$) 2 | | If(household monthly income >= 4000$) 3 | | Low income | 0,1 | If(household monthly income < 2000$) 1, otherwise 0 | independent variable | | Mid income | 0,1 | If(household monthly income >= 2000$ & household monthly income < 4000$) 1, otherwise 0 | independent variable | | High income | 0,1 | If(household monthly income >= 4000$) 3, otherwise 0 | independent variable |
| | Location | Hchg | 0,1 | For (t-2),(t-1),t year, if (there was the change of housing location) 1, otherwise 0 | independent variable | | Jchg | 0,1 | For (t-2),(t-1),t year, if (there was the change of job location) 1, otherwise 0 | independent variable |
| | Oil dummy | Oil dummy | 0,1 | if (oil price is the highest) 1, otherwise 0 | independent variable |
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