| Value | Category |
|---|---|
| 1 | It was by choice |
| 2 | Public transport too expensive |
| 3 | No available public transport |
| 4 | Not enough public transport |
| 5 | Nearby |
| 6 | Health reasons |
| 7 | To avoid traffic congestion |
| 8 | No parking at destination |
| 9 | Fuel costs |
| 10 | Other |
| 88 | Not applicable |
| 99 | Unspecified |