Evaluation the effect of some traffic characteristics on the safety performance of intersections.

Mhana, Mohammed H.; Alwani, Khalid Hardan; Mahmoud, Akram S.

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Evaluation the effect of some traffic characteristics on the safety performance of intersections.

Anbar Journal of Engineering Sciences

Article 5, Volume 11, Issue 2, Autumn 2020, Page 130-136 PDF (2280 K)

Document Type: Research Paper

DOI: 10.37649/aengs.2023.176832

Authors

Mohammed H. Mhana^* ¹; Khalid Hardan Alwani²; Akram S. Mahmoud³

¹Civil Engineering, College of Engineering, University of Anbar,

²Construcion and Projects Departmentg, Presidency of University, University of Anbar,

³Civil Engineering, College of Engineering, University of Anbar

Abstract

Traffic accidents and traffic delay have a negative impact on the mobility traffic flow due to their huge costs on the transport system. Thus one of the main primary aims for transport policy makers are reducing the negative effect of traffic accidents and traffic delay on the road network. In this study, fixed and random parameters Tobit models have been developed to model the accident rates from 20 intersections in Al-Karakh district in Baghdad City, Iraq. The safety significant of logarithm of annual average daily traffic, the percentage of heavy vehicles and the delay time for both major and minordirections for each intersection on the accident rates were evaluated. The main finding of this study shows that delay has an important effect on traffic accident rates of intersections. Regarding to the effect of other factors on traffic Accident rates, the result of the model shows that the logarithm of annual average daily flow, the percentage of heavy vehicles for both major and minor directions of the intersection are positively associated with more accident rates.

Keywords

Randam parameters Tobit model; intersection delay; accident rate safety function

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