Performance-Based Analysis of Geometric Design of Highways and Streets (2014) / Chapter Skim
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2C H A P T E R 1 This section provides a foundation for the subsequent process framework by describing the role and value of performance-based activities in geometric design of highways and streets. It provides the guiding principles of this report while outlining the fundamental model of the performance-based approach.
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Introduction 3 1.2 Role and Value of Geometric Design of Highways and Streets The Federal Highway Administration (FHWA) publication Flexibility in Highway Design (1)
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4 Performance-Based Analysis of Geometric Design of Highways and Streets 1.4 Fundamental Model of the Approach Exhibit 1-1 illustrates the following basic steps in performance-based analysis to inform geometric design: 1. Identify intended project outcomes (desired project performance)
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Introduction 5 4. Iterate design and outcomes to optimize.
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6 Performance-Based Analysis of Geometric Design of Highways and Streets Project performance can include other elements that may not be specific to common transportation outcomes of capacity, safety performance, or quality of service for multimodal users. Project performance could include other aspects such as implementing a highway, street, or design element within a specified project budget or construction timeline.
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Introduction 7 can greatly influence whether a project achieves intended outcomes. Specific design choices greatly influence operating speeds, operating environment, driver expectations, and safety performance.
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