An Update to AASHTO's Guidelines for Geometric Design of Very Low-Volume Local Roads
| 项目名称： | An Update to AASHTO's Guidelines for Geometric Design of Very Low-Volume Local Roads |
| 摘要： | The geometric design of facilities designated as low volume presents unique challenges to engineers across the United States. These roadways, designated by low traffic volumes thus reduced frequency of crashes, require the use of design principles unlike those applied to higher volume roads. Accomplishing the design of a low-volume highway - its three-dimensional features (horizontal alignment, vertical alignment and cross-section) and appurtenances to provide for drainage, traffic control and safety, requires a well-defined process. AASHTO initially developed the guidelines for geometric design of very low-volume roads in 1996 and the final product was published in 2001. During the past 11 years, much has changed in the vehicle fleet, knowledge about driver characteristics (i.e., human factors), and safety and operations of these types of facilities. AASHTO policy requires that all reference material be reviewed and analyzed for potential updates. An assessment of the current publication and design process is needed to appropriately leverage and/or reflect recent advances and emerging issues contained in the documents. The objective of this project was to identify needed updates to current design policy, and/or necessary changes in the fundamental design process to incorporate the latest design principles. |
| 状态： | Completed |
| 资金： | 100000 |
| 资助组织： | National Cooperative Highway Research Program<==>American Association of State Highway and Transportation Officials (AASHTO)<==>Federal Highway Administration |
| 开始时间： | 20130618 |
| 预计完成日期： | 20151214 |
| 主题领域： | Design；Highways；Operations and Traffic Management；Safety and Human Factors |
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