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Page 45
Suggested Citation:"Conclusion." National Academies of Sciences, Engineering, and Medicine. 2018. An Expanded Functional Classification System for Highways and Streets. Washington, DC: The National Academies Press. doi: 10.17226/24775.
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Page 45

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45 Conclusion The goal of the Expanded FCS is to achieve appropriate contextual multimodal roadway designs. This goal is achieved with: • Expanded context categories • Recognition of network importance in roadway types • Consideration of all roadway user groups The Expanded FCS provides a flexible framework for professionals to conceptualize projects based on their current/future context and create a modal balance to achieve successful outcomes. The output of the Expanded FCS process aids in the development of the purpose and need state- ment and helps professionals define the required design elements and their potential tradeoffs. The Expanded FCS matrix provides professionals with a range of design options based on the context and roadway type. Modal needs and volumes must be accounted for to determine each mode’s requirements and any special overlays that may be necessary. These considerations will allow the planner/designer to identify potential areas of concern and determine the tradeoffs required to best accommodate all users. Alternative designs should be developed and evaluated in order to deliver a design that is contextually appropriate. The planner/designer is advised to follow the principles and process of CSS for further project development and delivery. The reader may refer to the following two case studies for demonstrations of how the Expanded FCS can be applied to various contexts (Case Study 1) and how the framework can be used to achieve multimodal accommodation (Case Study 2).

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TRB's National Cooperative Highway Research Program (NCHRP) Research Report 855: An Expanded Functional Classification System for Highways and Streets builds upon preliminary engineering of a design project, including developing the purpose and need. In particular, it provides additional contexts beyond urban and rural, facilitates accommodation of modes other than personal vehicles and adds overlays for transit and freight. Two case studies illustrating an application of the expanded system to actual projects are included. Accompanying the report is NCHRP Web-Only Document 230: Developing an Expanded Functional Classification System for More Flexibility in Geometric Design, which documents the methodology of NCHRP Research Report 855.

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