Analysis of speed characteristics for rural two-lane roads: A field study from Minoufiya Governorate, Egypt

被引：42

作者：

Hashim, Ibrahim Hassan ^{[1
]}

机构：

[1] Minoufiya Univ, Fac Engn, Dept Civil Engn, Shibin Al Kawm, Egypt

来源：

AIN SHAMS ENGINEERING JOURNAL | 2011年 / 2卷 / 01期

关键词：

Free flow speed; Headway; 85th percentile speed; Speed limit; Distribution of spot speeds;

D O I：

10.1016/j.asej.2011.05.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents an analysis into speed characteristics on rural two-lane highways under existing conditions. Empirical data from several study sites on intercity rural two-lane roads in Minoufiya Governorate, Egypt were used in this investigation. Three separate however relevant analyses are presented in this paper. The first analysis investigates the relationship between 85th percentile speed and headway to define a headway value corresponding to free moving vehicles. The second analysis examines the suitability of the posted speed limits on the roads under study. The third and last analysis inspects the conformity of the study sites' speed data with normal distributions. It was found that the 85th percentile speed took a constant value at headway equal to 5 s or more. Also, a significant proportion of drivers exceed the posted speed limit as well as the current speed limit may not be appropriate. Finally spot speed data follow a normal distribution. (C) 2011 Ain Shams University. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：43 / 52

页数：10

共 21 条

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