Performance-Based Analysis of Geometric Design of Highways and Streets (2014) / Chapter Skim
Currently Skimming:
Pages 8-15
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 8... ...
8C H A P T E R 2 This chapter provides an overview of geometric design decisions within the project development process and the relationship between project-level and geometric design performance measures. In addition, the geometric design activities within each project stage, environmental evaluations, and context-sensitive design approaches are discussed.
|
From page 9... ...
Geometric Design Decision Making and Performance 9 meaningful stakeholder engagement can begin in the planning stages and continue through construction. Similarly, a designer may investigate roadway profiles or bridge type constructability while identifying and evaluating alternatives even if the overall geometrics are at the 15% design level.
|
From page 10... ...
10 Performance-Based Analysis of Geometric Design of Highways and Streets along with performance target categories from MAP-21. Geometric design choices and their resulting performance can directly influence and be influenced by project performance goals, objectives, or targets.
|
From page 11... ...
Geometric Design Decision Making and Performance 11 defining the number of lanes that will remain open at any given time, or the quality of service expected for the range of work zone users. As outlined in NCHRP Report 581: Design of Construction Work Zones on High-Speed Highways (1)
|
From page 12... ...
12 Performance-Based Analysis of Geometric Design of Highways and Streets If needed, state or federal environmental review and impact documentation efforts begin in this stage. A discussion of the general environmental review and impact documentation activities is included in Section 2.4, which highlights where and how geometric design and project performance in the alternatives identification and evaluation and preliminary design stages support the environmental review and impact documentation activities.
|
From page 13... ...
Geometric Design Decision Making and Performance 13 2.4 Geometric Design and Environmental Evaluations and Clearance This section summarizes how geometric design and performance-based decisions relate to state and federal environmental policy act considerations. Even without environmental clearance needs, the early stages of project development strive to understand project scope and develop alternatives responding to a project-specific purpose and need.
|
From page 14... ...
14 Performance-Based Analysis of Geometric Design of Highways and Streets stage. The circle on the left reflects relatively low levels of environmental clearance needs such as a categorical exclusion in the National Environmental Policy Act (NEPA)
|
From page 15... ...
Geometric Design Decision Making and Performance 15 and identify a range of possible solutions applicable to each project environment. Performancebased analyses of geometric design elements provide the means to support flexible design solutions or elements to adapt to unique project needs.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.