Application of the Highway Safety Manual-2010 to Expect Average Crash Frequency at Full Cloverleaf Interchange

Authors

  • Kamran Rahimov Tehran Payam Noor University, Tehran, Iran.
  • Sadegh Samadi Tehran Payam Noor University, Tehran, Iran.
  • Mohammadreza Neghabi Tehran–azad university, Tehran, Iran

DOI:

https://doi.org/10.5249/jivr.v11i2.1352

Keywords:

Full Cloverleaf Interchange, IHSDM – HSM, Expected Crash Severity, Expected

Abstract

Background: In this study, suggested pattern of HSM-2010 has been developed to expect crashes on Azadegan Interchange in the Tabriz, Iran. IHSDM – HSM software was used to predict and expect the average crash frequency, crash severity, and crash type distributions.

Methods: The site that evaluated in this study was a full cloverleaf interchange in an urban area. It is a service Interchange at the junction between a freeway and a minor arterial cross Street. When using the Predictive, the freeways and ramps within the defined project limits were divided into individual sites. A site is a homogeneous freeway segment and homogenous ramp segments. The focus of the discussion in this study is on the sites located in the vicinity of an interchange due to the complexity of interchange roadways.

Results: The results of this study showed that the calibration factors obtained for this interchange were 3.68 for FI crashes and 1.35 for property damage only. It was also observed that using accident statistics occurred at the Azadegan interchange by 2016 and 2017 as well as the geometric characteristics of the interchange, the total expected average crash frequency by 2018 is 13.70, of which 7.8 cases were fi crashes, and 5.9 cases are property damages only. It was also observed that in the freeway segment, the severity of the expected fatal injuries, incapacitating injuries and non-incapacitating injuries, decreased by approximately 95, 86 and 4% respectively, and the expected possible injuries and the property damage only ( no injury ) increased by 156% and 239%, respectively. Also, in the entrance and exit ramps of the interchange, the expected severity of the fatal injuries, incapacitating injuries and non-incapacitating injuries, possible injuries and the property damage only ( no injury ), decreased by approximately 98, 94, 53, 24 and 1% respectively.

Conclusion: Use of highway safety manual to assess the interchanges, provide useful information to predict and expect the average crash frequency, crash severity, and crash type distributions.

 

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Published

2019-10-07

How to Cite

Rahimov, K., Samadi, S., & Neghabi, M. (2019). Application of the Highway Safety Manual-2010 to Expect Average Crash Frequency at Full Cloverleaf Interchange. Journal of Injury and Violence Research, 11(4). https://doi.org/10.5249/jivr.v11i2.1352

Issue

Vol. 11 No. 4 (2019): Annual Conference Supplement 2019

Section

Oral Abstracts

License

Copyright.  In accordance with Bethesda Statement on Open Access Publishing (released June 20, 2003, available from: http://www.earlham.edu/~peters/fos/bethesda.htm), all works published in JIVR are open access and are immediately available to anyone on the website of the journal without cost. JIVR is an open-access journal distributed under the terms of the Creative Commons Attribution 3.0 License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.