Studying the effect of spiral curves and intersection angle, on the accident ratios in two-lane rural highways in Iran

  • Mohammad Hossain Jalal Kamali
  • Mohammad Saeed Monajjem
  • Mohammad Sadegh Ayubirad
Keywords: Horizontal curves, Spiral curves, Clothoid curves, Intersection angle, IHSDM.

Abstract

Safety in highways is one of the most important subjects in Transportation Engineering. Increasing rate of vehicles and the needs to design or geometrically modifying the highways, emphasized on the safe-designing of the roadways more than before. Between the constructive components of the highway, horizontal curves due to the more occurrences of accidents are of great importance. The American ministry of highway and transportation introduced the software IHSDM, with variant capabilities, to predict accidents. In this research, five types of curves (simple circle curve and clothoid-circle-clothoid) at different intersection angles were designed, and accident rates based on the standard specifications on each curve was predicted by using the IHSDM, and the results are compared with each other. Finally, by processing the curves of accident rates versus the curves types and intersection angle, and comparing them with each other, the necessity of using spiral curves in the highway design is emphasized.

Author Biographiesaaa replica rolex repwatches replica rolex watches for men replica iwc watch

Mohammad Hossain Jalal Kamali
Graduate Student, Faculty of Engineering, Shahid Chamran University of Ahvaz, Iran
Mohammad Saeed Monajjem
Assistant Professor, Faculty of Civil Engineering, K.N.Toosi University of Technology, Tehran, Iran
Mohammad Sadegh Ayubirad
Graduate Student, Faculty of Civil Engineering & Architecture, Malayer University, Iran

References

- Iran’s Management and Planning Organization (1992). “Highways Geometrical Design Standard “, 161 issue, publication of Iran’s Management and Planning Organization.

- A Policy on Geometric Design of Highways and Streets (2004) ,AASHTO ,Washington D.C.

- Bitzl .(1964) 'The safety level of roads', Research road construction and road traffic technique' Ministry of transportation, vol.28

- Feuchtinger, M.E., Christoffers, C. (1953) 'Driving Dynamic Investigation as Measure of Road-Traffic-Safety' , Journal for traffic safety, vol.1

- Kerbs, H.G., 'Kloechner, J. H. (1977) 'Investigation of the Effect of Highway and traffic conditions outside build-up areas on accident rates', research road construction and road traffic technique, ministry of transportation

- Lamm, R.,Mailaender, T. and Psarianos B. (1999) 'Highway design and traffic safety engineering handbook'

- Zegeer, C.V. , Twomey, J.M.Heckman, M.L. and Hayward, J.C.(1992) ' Safety effectiveness of highway design features'

Published
2013-07-19
How to Cite
1.
Jalal Kamali MH, Monajjem MS, Ayubirad MS. Studying the effect of spiral curves and intersection angle, on the accident ratios in two-lane rural highways in Iran. Promet [Internet]. 2013Jul.19 [cited 2024Dec.3];25(4):343-8. Available from: https://traffic.fpz.hr/index.php/PROMTT/article/view/332
Section
Articles