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Unknown - Road condition is unknown
Good Condition - Road is 2WD driveable in most cases or easily driven in a 4WD.
Somewhat Degraded - Road has rough spots, water bars or moderate washouts and may require high-clearance 4WD
Heavily Degraded - Road requires high clearance 4WD. There may be challenging washouts, dangerous sections or exceptionally deep water bars.
Impassable - Road is impassable or requires highly specialized vehicles to drive
Note that gates, avalanches and snow lines should not qualify a road as impassible.