Variables | Distance (km) |
---|
Road | < 1 | 1.0–2.0 | 2.1–3.0 | 3.1–4.0 | 4.1–5.0 | 5.1–6.0 | ≥ 6.1 |
 Primary1 | 45 | 12 | 4 | 6 | 2 | 1 | 6 |
 Secondary2 | 40 | 26 | 9 | 12 | 3 | 4 | 10 |
Water |
 Perennial3 | 51 | 52 | 25 | 14 | 9 | 19 | 13 |
- 1Primary road is a well-maintained road in a recognized system of highways
- 2Secondary road is an alternative way from the primary road, usually a two-way road for moderate or slow speed drive
- 3Perennial water body is a permanent water body that keeps full or flowing throughout the seasons