USDA Forest Service Missoula Technology and Development Center Facilities Toolbox: Accessibility Tools
Surfaces
An accessible surface is firm and stable. Use caution with the size and depth of gravel when maintaining unpaved surfaces. Generally, smaller graded gravel with some fine material can be compacted to a firmer surface than larger graded gravel or when all gravel particles are the same size. Depending on the surfacing material, mixing in some soil stabilizer might provide an accessible surface at little cost.
Rule of thumb:
If you could ride a narrow-tired bicycle AND if you could push a chubby 3-year-old child in an "umbrella" stroller across the surface without making ruts, a person in a wheelchair can probably cross the surface.
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