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Flexible Stochastic Frontier Approach to Predict Spot Speed in Two-Lane Highways
| 题名： | Flexible Stochastic Frontier Approach to Predict Spot Speed in Two-Lane Highways |
| 正文语种： | 英文 |
| 作者： | Transports and Environment Univ |
| 作者单位： | Antonio Lobo;Antonio Couto;Carlos Rodrigues |
| 关键词： | Spot speed; Two-lane highways; Road design; Stochastic frontier modeling |
| 摘要： | The approach to spot speed prediction in two-lane highways followed in this study aims to evaluate the effects of a comprehensive set of speed factors, with a special focus on the geometric characteristics of the road segment to which the element belongs. Two flexible models were developed for different types of roads based on a stochastic frontier formulation in which the maximum operating speed is estimated as a function of road geometries, and the one-sided disturbance accounts for diversity in driving behavior and vehicle characteristics, allowing the estimation of any percentile speed. The models are applicable to horizontal curves and tangents and consider both on-site characteistics and aggregated variables characterizing the road segment. The results show a clear influence of segment features on different percentile spot speeds, revealing that recent driving experience and expectations about the quality of the geometric design influence the way a driver approaches a specific road element. Additionally, this study contributes to addressing some of the limitations of existing speed models identified in the literature. |
| 出版年： | 2016 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | Vol.142 |
| 期： | No.8 |
| 页码： | 04016032 |
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