Effects of Geometric Features on Rear-End Crash Incidence on Mountainous Two-Lane Highway

In order to improve the safety level of mountainous two-lane highway, this paper investigated the relationship between highway geometric features and rear-end crash incidence. By using negative binomial generalized models and separating the 139 kilometers highway segment into 94 successive vertical slope units, the statistical software Stata9.0 was used to evaluate the effects of eight (8) variables which were based on roadway geometric characteristics on the incidence of rear-end crashes occurred from 2003 to 2005 on mountainous two-lane highway in Gansu Province. Unrelated geometric variables were dropped one by one by using step regressing method. Finally, the variables found to influence the incidence of rear-end crashes significantly was accumulated vertical slope length. The regression analysis results suggest that there are strong positive relationships between the incidence of rear-end crashes and accumulated vertical slope length. So it is wise to avoid too long successive down slope when designers are engaged in fresh highway designs on considering safety effect.

• Record URL:
  • https://doi.org/10.1061/41039(345)239
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784410394
• Supplemental Notes:
  • © 2009 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Wang, Huarong
  • He, Yulong
  • Sun, Xiaoduan
  • Hu, Xiyuan
• Conference:
  • Second International Conference on Transportation Engineering
  • Location: Chengdu , China
  • Date: 2009-7-25 to 2009-7-27
• Publication Date: 2009-7

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1444-1450
• Monograph Title: International Conference on Transportation Engineering 2009

Subject/Index Terms

• TRT Terms: Geometric design; Highway design; Mountain roads; Rear end crashes; Slopes; Traffic incidents; Traffic safety
• Geographic Terms: China
• Subject Areas: Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 01529831
• Record Type: Publication
• ISBN: 9780784410394
• Files: TRIS, ASCE
• Created Date: Jun 30 2014 9:44AM