Types | Decks | Rail Systems | Abutments | Materials |
Standard Drawings/Design Aids | Additional Trail Bridge Resources
Forest Service policy is to design facilities to fit esthetically within Recreation Opportunity Spectrum (ROS) classes. The ROS offers a framework for understanding the relationship between access, remoteness, naturalness, social encounters, visitor impacts, visitor management, and appropriate facilities. The ROS has been divided into six major classes for Forest Service use: Urban (U), Rural (R), Roaded Natural (RN), Semiprimitive Motorized (SPM), Semiprimitive Non-Motorized (SPNM), and Primitive (P). The "ROS Line" indicates that a particular bridge, deck, handrail, or abutment is "usually compatible" (with the surrounding environment) when the line is black, "sometimes compatible" is indicated by gray, and "usually incompatible" is indicated by white.
Recreation Opportunity Spectrum line example: