30 A SUMMARY OFACCESSIBILITY STANDARDS FOR OUTDOOR DEVELOPEDAREAS accessibility standards for Federal outdoor developed areas When a new trail information sign is provided at the trailhead on a newly constructed or altered trail designed for use by hikers or pedestrians, the sign must provide information about the accessible characteristics of the trail. This requirement applies to new trailhead information signs regardless of whether the newly constructed or altered trail complies with the technical requirements for trails. The new trail information signs must include the following information: ¡ ¡ Length of the trail or trail segment ¡ ¡ Type of trail surface ¡ ¡ Typical and minimum trail tread width ¡ ¡ Typical and maximum trail grade ¡ ¡ Typical and maximum trail cross slope Signs can provide additional information to help people with disabilities decide whether or not to attempt a trail. For example, information about the height of any major obstacles, such as boulders in the trail tread, can help people determine if they can overcome these barriers. It is helpful to have a caution notice indicating that the International Symbol of Accessibility (ISA) The ISA is not required or encouraged on trail information signs. posted information reflects the condition of the trail when it was constructed or assessed and on what date the information was current. Because conditions in the outdoors are subject to change, knowing when an assessment was made is very helpful.
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