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Classification of Uncontrolled Intersections Using Hierarchical Clustering

  • Research Article-Civil Engineering
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Abstract

This research helps define motorized level of service (MLOS) for different categories of uncontrolled intersections using mixed hierarchical clustering technique. Service and total delay has been considered for classifying MLOS and intersections, respectively. GPS is used to collect travel time and speed data for turning movements which are transformed to average delay values. Thirteen intersections from eight different cities in India form the dataset. Divisive followed by agglomerative clustering (DAC-HAC) algorithm is applied as a two-step process for obtaining the service and total delay ranges. Validation of clusters is performed based on Davies–Bouldin score, Calinski–Harabasz index and Silhouette gaps. Based on DAC-HAC, uncontrolled intersections are classified into six categories (Cat-I, II, III, IV, V and VI). Results indicate MLOS classes “D”, “E” and “F” have significantly higher service delay ranges as compared to Highway Capacity Manual “control” delay ranges indicating mixed traffic conditions. Most of the uncontrolled intersections under mixed traffic fall under Cat-IV, V and VI having higher total delay ranges (greater than 60 s/vehicle/approach). Finally, validation of the clustering results is done for geometric and roadside environmental features.

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Data used for analysis have been collected by the authors and no other third-party publisher or source is responsible for data reproduction and some/all data collected/reproduced are available with permissions from the authors of this manuscript.

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Funding

The research did not receive any special funding but was performed with due responsibilities of the authors themselves.

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Contributions

SR helped in conceptualization; SPSR helped in methodology; SD, SR contributed to formal analysis and investigation; SD helped in data extraction and modulation; SD helped in writing—original draft preparation; SD, SR helped in writing—review and editing; SR helped in resources; SR, SPSR contributed to supervision.

Corresponding author

Correspondence to Sarvesh P. S. Rajput.

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Conflict of interest

On behalf of all the authors, the corresponding author wants to declare that there are no competing interests with any other studies exclusive to the study presented in this manuscript

Appendix I

Appendix I

See Table 5.

Table 5 Validation of DAC-HAC MLOS and uncontrolled intersection classification under varied traffic and road environmental situations for the present study

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Datta, S., Rokade, S. & Rajput, S.P.S. Classification of Uncontrolled Intersections Using Hierarchical Clustering. Arab J Sci Eng 45, 8591–8606 (2020). https://doi.org/10.1007/s13369-020-04753-7

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  • DOI: https://doi.org/10.1007/s13369-020-04753-7

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