Arabian Journal for Science and Engineering

, Volume 44, Issue 5, pp 4667–4679 | Cite as

Quantification of LOS at Uncontrolled Median Openings Using Area Occupancy Through Cluster Analysis

  • Malaya MohantyEmail author
  • Partha Pratim Dey
Research Article - Civil Engineering


This study quantifies LOS ranges for traffic movement at uncontrolled median openings using ‘area occupancy’ as a measure of effectiveness. The Highway Capacity Manual is silent about LOS ranges at uncontrolled median openings. Traditionally, traffic density is considered as an important parameter for quantifying the traffic flow. However, it does not consider the heterogeneous characteristics of the traffic stream. Further, occupancy also does not explain the heterogeneous traffic and the absence of lane discipline which is predominant in developing countries. Therefore, area occupancy is used in this study to assess the performance of traffic conditions at median openings. The established method to measure area occupancy has been modified to overcome the assumption used in earlier techniques. Area occupancy has been estimated for both major and minor traffic streams. K-mean clustering has been employed to classify area occupancy ranges for various LOS categories. This methodology could be beneficial for practitioner engineers to monitor the vehicular movement at median opening.


Area occupancy Level of service (LOS) Clustering K-means Median openings U-turns 


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I hereby acknowledge my Ph.D. supervisor and co-author Dr. Partha Pratim Dey for always providing the proper direction to move forward in research. I also acknowledge Mr. Alok Kumar Samantaray, a fellowresearch scholar,who helped me to learn the basics ofMATLAB. Finally, I acknowledge my institute, IIT Bhubaneswar, for always helping me morally and financially to pursue my research.

Compliance with Ethical Standards

Funding Information

I am pursuing my Ph.D. at IIT Bhubaneswar, India, and get institute fellowship for my research from MHRD, India. Therefore, all my research funding is borne by MHRD, India, and IIT Bhubaneswar, India.

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.


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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of InfrastructureIndian Institute of Technology, BhubaneswarBhubaneswarIndia

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