| Value | Category | Cases | |
|---|---|---|---|
| -3 | illegal missing | 0 |
0%
|
| -2 | dont know | 0 |
0%
|
| -1 | refuse | 0 |
0%
|
| 1 | Paved, multi-lane in each direction | 0 |
0%
|
| 2 | Paved, single-lane in each direction | 28 |
27.7%
|
| 3 | Gravel | 63 |
62.4%
|
| 4 | Dirt | 10 |
9.9%
|
| Sysmiss | 924 |