Developing an Optimization Model to Manage Unpaved Roads

Table 3

Service level of county unpaved roads.

Service level	Traffic, vehicles per day	Top width, ft
Very high	>400	≥28′
High	151–400	23′–27.5′
Medium	51–150	18′–22.5′
Low	16–50	13′–17.5′
Very low	5–15	10′–12.5′
None	<5	≤8.5′