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Validation of Urban Freeway Models. The Second Strategic Highway Research Program
| 题名： | Validation of Urban Freeway Models. The Second Strategic Highway Research Program |
| 作者： | Mirchandani, P.; Zhou, Z.; Ahn, S. |
| 关键词： | Urban freeways##Travel times##Validation models##Travel time reliability##Data validation## |
| 摘要： | This report describes the methodology, data, conclusions, and enhanced models regarding the validation of two sets of models developed in SHRP 2 Reliability Project L03, Analytical Procedures for Determining the Impacts of Reliability Mitigation Strategies. The significance of the L03 models is they were among the first models that could be used to predict travel time reliability. Loosely speaking, reliability is defined as how travel time changes over time. More rigorously, reliability is defined as “the level of consistency in travel conditions over time, measured by describing the distribution of travel times that occur over a substantial period of time. Specific reliability measures can be derived from the travel time distribution, such as the standard deviation and the Travel Time Index (n), or TTIn, which is the nth percentile of the travel time distribution divided by the free-flow travel time. |
| 总页数： | 390 |
| 报告类型： | 科技报告 |
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