The Effects of Speed and Flow Characteristics on Crash Rates for Wasit Multi-lane Highways in Iraq
Keywords:Traffic safety, crash rates, multilane highways, average spot speed, hourly traffic volume, multiple regression.
This study describes traffic crash rates in selected multilane rural highways in Wasit governorate in Iraq. The main objective of this research is to investigate relationships between total, fatal crash rates and their kinds and factors such as hourly traffic flow and average spot speed.
The study is based on data collected from two sources: police stations and traffic surveys. Three highways are selected to cover the locations of the accidents. The selection includes Kut – Suwera with five segments, Kut – ShekhSaad with three segments, and Kut – Hay with two segments multilane divided highways.
Multiple linear regression analysis is applied to the data by using SPSS software to attain the relationships between the dependent variables and the independent variables in order to identify elements that are strongly correlated with crashes rates and severity.
Seven regression models are developed which verify weak and strong statistical relationships between crashes types and average spot speed with hourly traffic flow respectively. As the hourly traffic flow of automobile grows, the need for safe traffic facilities also grown.
CSO, 2019 "Statistics Roads Traffic Crashesin Iraq in 2018", Central Statistical Organization, Ministry of Planning,.
Rural and Urban Crashes: A Comparative Analysis. U.S. Department of Transportation Technical Report1996. DOT HS 808 450..
Lassarre, S.. 1996The Introduction of the Variables Traffic Volume, Speed, and Belt- Wearing into a Predictive Model of the Severity of Accidents. CrashAnalysis and Prevention. Vol. 18. No. 2. pp. 129-134.. DOI: https://doi.org/10.1016/0001-4575(86)90057-6
Lord, D., A. Manar, and A. Vizioli. 2005Modeling Crash–Flow–Density and Crash–Flow–V/C Ratio for Rural and Urban Freeway Segments. CrashAnalysis and Prevention, Vol. 37, No. 1,. DOI: https://doi.org/10.1016/j.aap.2004.07.003
Harwood, D. W. 1995Relationships Between Operational and Safety Considerations in Geometric Design Improvements. In Transportation Research Record 1512, TRB, National Research Council, Washington, D.C.,.
Razouki S.S, Fady S. Yasso, Saba S. Yaso, Petra S. Yasso, Isam V. Dafdony, 2013"Medical -Engineering Pattern of Severe Iraqi Road Traffic Accidents", American Journal of Medical Sciences and Medicine, , Vol. 1, No. 5, 86-91,.
Aarts, L., and Schagen, I. van 2006"Driving Speed and the Risk of Road Crashes: A review". CrashAnalysis and Prevention, 38,215–224, . DOI: https://doi.org/10.1016/j.aap.2005.07.004
WHO, 2018World Health Organization, "Speed and Road Crashes". PAHO/NMH/18-007, Pan American Health Organization,.
Wang, C.; Quddus, M.; Ison, S2013. "A Spatio-Temporal Analysis of the Impact of Congestion on Traffic Safety on Major Roads in the UK. Transp. A Transp. Sci., 9, 124–148,. DOI: https://doi.org/10.1080/18128602.2010.538871
Retallack, A.E.; Ostendorf, B2019." Current Understanding of the Effects of Congestion on Traffic Accidents". Int. J. Environ. Res. Public Health, 16, 3400,. DOI: https://doi.org/10.3390/ijerph16183400
Eenink, R., et al2008. "CrashPrediction Models and Road Safety Impact Assessment: Recommendations for Using These Tools". Final report. Deliverable D2 of the RiPCORD-iSEREST project. European Commission, Directorate-General for Transport and Energy, Brussels. .
Khisty C. Jotin and Lall B. Kent2003, "Transportation Engineering: An Introduction", 3rd Edition, Illinois Institute of Technology, Chicago, Portland State University,.
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