| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 0 |
0%
|
| -1 | refuse | 1 |
0.3%
|
| 1 | Paved, multi-lane in each direction | 148 |
39.6%
|
| 2 | Paved, single-lane in each direction | 166 |
44.4%
|
| 3 | Gravel, single-lane in each direction | 31 |
8.3%
|
| 4 | Dirt, single lane | 28 |
7.5%
|
| Sysmiss | 675 |