Investigating the Effect of Access-point density on Traffic Crash on Rural Two-Lane Highways (Case study: Ahar- Tabriz Highway)

Document Type : Scientific - Research

Authors

1 Assistant Professor, Faculty of Enginerng , Unversity of Zanjan, Zanjan, Iran

2 MSc. Grad., Faculty of Engineering, Islamic Azad University- Ahar Branch, Ahar, Iran

Abstract

The high cost of traffic crashes in most countries has forced managers and authorities to constantly try to improve highway safety. Several studies show that access points are one of the main sources of crashes on rural roads especially on two-lane highways. Access point's specification specially types, their spacing, traffic and geometric design has an important role in highway safety. This research study investigates the effect of spacing and geometric features of access points on crashes on Ahar- Tabriz two-lane highway. In this research study, Ahar- Tabriz highway divided into 19 sections. For all sections, three years crashes data and geometric features of access points collected. In this paper, the descriptive and regression analysis is performed on three years crashes data. The results showed that the density of access directly related to the accident rate. This study showed that how crash rates clearly rise with increasing of access densities and reducing of access points spacing.

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References

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History

  • Receive Date: 02 September 2015
  • Revise Date: 30 May 2017
  • Accept Date: 07 June 2017

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