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Mitigation Strategies for Design Exceptions. Final rept. Sep 05-May 07.
| 题名： | Mitigation Strategies for Design Exceptions. Final rept. Sep 05-May 07. |
| 作者： | Stein-W.J.; Neuman-T.R. |
| 关键词： | *Roads-; *Design-criteria.;Highway-safety; Highway-engineering; Environmental-impacts; Construction-; Pavements-; Bridges-; Performance-evaluation; Traffic-operations; Costs-; Case-studies. |
| 摘要： | Design criteria, established through years of practice and research, form the basis by which highway designers strive to balance cost, safety, mobility, social and environmental impacts, and the needs of a wide variety of roadway users. For many situations, there is sufficient flexibility within the design criteria to achieve a balanced design and still meet minimum values. On occasion, designers encounter situations in which the appropriate solution may suggest that using a design value or dimension outside the normal range of practice is necessary. In these cases, a design exception may be considered. A design exception is a documented decision to design a highway element or a segment of highway to design criteria that do not meet minimum values or ranges established for that highway or project. This publication provides detailed information on design exceptions and mitigating the potential adverse impacts to highway safety and traffic operations. |
| 报告类型： | 科技报告 |
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