36 CFR Part 1191 ABA Accessibility Guidelines, Outdoor Developed Areas - Preamble

1016.7.1 Maximum Running Slope and Segment Length

This section requires the running slope of any segment of an outdoor recreation access route to not be steeper than 1:10 (10%). Where the running slope of a segment of an outdoor recreation access route is steeper than 1:20 (5%), the maximum length of the segment is specified in Table 1016.7.1, and a resting interval is required at the top and bottom of each segment. Gradual running slopes are more useable by individuals with disabilities. Where the terrain results in steeper running slopes, resting intervals are required more frequently. Where running slopes are less severe, resting intervals are permitted to be further apart.