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Provide boardwalks in wet areas. Bridge and boardwalk decks Wetlands trails provide opportunities to discover and learn must be flush with the trail surface and handrails should be about nature. installed. Position decking board's perpendicular to the trail path with gaps between boards not exceeding 3/8 inch. Biking and Park Major Circulation Trails Though shared-use Visually handicapped persons can use guide ropes or definite paths are intended for many users including maintenance and edges such as logs or railroad ties to help with direction. emergency vehicles, the bicycle is the design vehicle of Although trails usually are located on level terrain with grades choice. rarely exceeding 5 percent, acceptable grades will vary depending on the abilities and expectations of trail users. Site Selection: Provide regular rest stops on steep slopes and at least 36 • Areas with unique natural beauty or views inches of level, cleared space should be provided to the side • Determine opportunities to improve student walking of benches for wheelchairs. Provide plenty of space at scenic routes overlooks for persons to watch and listen. Safety rails must be • Wide enough areas to locate trail away from homes or carefully located to ensure that the sight line of persons in businesses wheelchairs is not blocked. • Determine wildlife habitat areas to view or avoid that will impact trail design Paved Trails • Access to neighborhoods and roads Typical paved path types: Paved trails provide year round recreational access to public Provide: spaces. The trails should be located to take advantage of • 10 feet is the standard width for a two-way shared-use opportunities for trail users to experience the beauty of path; paths should be 12 feet wide or more in areas Everett's Parks. with high mixed-use. Faster-moving bicyclists require greater width than pedestrians; optimum width should Hiking trails are usually located in natural settings, are be based on the relative use by these two modes. High generally more than 1 mile in length, and may be only a use by skaters may also require greater width narrow paved footpath with minor improvement such as • The minimum width is 8 feet. However, 8-foot wide benches or signs. paths are not recommended in most situations because they may become over-crowded. They should Nature/ interpretive trails are usually shorter trails of a mile or only be constructed in low use areas in smaller parks two in length and are likely to form complete loops. Nature • Everett Parks references the AASHTO Guide for the trails often have interpretive signs brochures for self-guided Development of Bicycle Facilities for path design tours, bird watching blinds and a variety of enhancements for standards. The AASHTO guide should be consulted for studying wildlife. geometric design standards such as sight-distance and Wetland trails often include boardwalks that make the wetland alignment • Visibility corridor a minimum of 3 to 4 feet wide on each terrain accessible while protecting it from degradation. side of the trail where possible to improve safety 37