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2013 Forest Service Outdoor Recreation Accessibility Guidelines (FSORAG)

3.1.3.3 Cross Slope of Driveways.

The cross slope of driveways shall not exceed 1:33 (3 percent).

drawing of truck parked in driveway with a maximum 3% cross slope and 5% running slope

Exception. The cross slope of driveways may be no more than 1:20 (5 percent) where needed to ensure proper drainage or to transition from the running slope of a campground road. 

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