Development of the 8th Edition of AASHTO's A Policy on the Geometric Design of Highways and Streets (Green Book)
| 项目名称： | Development of the 8th Edition of AASHTO's A Policy on the Geometric Design of Highways and Streets (Green Book) |
| 摘要： | AASHTO’s A Policy on Geometric Design for Rural Highways (the Blue Book, first published in 1954) and A Policy on Arterial Highways in Urban Areas (the Red Book, first published in 1957) were early nationally recognized standards for geometric design. In 1984, the Blue Book and Red Book were combined to create the first edition of AASHTO’s A Policy on the Geometric Design of Highways and Streets (commonly known as the Green Book). The 1984 Green Book was organized around roadway Functional Classification (Local, Collector or Arterial) and broad Context Classification (Urban or Rural) with design criteria based primarily on motor vehicles. Subsequent Green Book editions retained this basic framework for geometric design guidance. While the basic 10 chapter framework in the Green Book has served practitioners well for new construction or new location projects, it lacks the guidance needed for today’s challenging projects where transportation professionals must balance safety, mobility, and other concerns for all modes of travel. Public works projects are more sensitive to funding than ever before and cost magnitude and cost effectiveness often play large roles in scoping projects. In some locations, especially constrained ones, designing to recommended Green Book criteria is neither feasible nor necessary and a flexible approach can produce a better performing design that is sensitive to the context, environment, and the needs of all of the users of the facility. Design decisions made must consider the effects on safety, mobility, reliability, resilience, accessibility, equity, public health, the environment, land use, and other factors and the rationale for these decisions be clear to the public. Over the past 15 years, the AASHTO Technical Committee on Geometric Design (TCGD) has been exploring how the Green Book could have greater value to the designers of today. The objective of this research is to develop a draft 8th Edition Green Book (GB8) suitable for balloting through AASHTO processes. |
| 状态： | Active |
| 资金： | 1000000 |
| 资助组织： | National Cooperative Highway Research Program<==>American Association of State Highway and Transportation Officials (AASHTO)<==>Federal Highway Administration |
| 项目负责人： | Crichton-Sumners, Camille |
| 执行机构： | Texas A&M Transportation Institute (TTI) |
| 开始时间： | 20210510 |
| 预计完成日期： | 20230510 |
| 主题领域： | Design；Highways；Policy |
相关文献
- Research for AASHTO Standing Committee on Highways. Task 423. Planning for a Comprehensive Update and Restructuring of AASHTO's A Policy on Geometric Design of Highways and Streets (8th Edition)
- Update of the Policy on Geometric Design of Highways and Streets Guidance on Acceleration/Deceleration and Stopping Sight Distance Criteria
- Reliability and Quality of Service Evaluation Methods for Rural Highways
- Research for AASHTO Standing Committee on Highways. Task 405. Reevaluation of the Perception and Reaction Time and Deceleration Rates for Stopping
- Identification of AASHTO Context Classifications
- Median Intersection Design for Rural High-Speed Divided Highways
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