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Title:

Automobile Level of Service Criteria by Two Step Clustering of Speed Profile Variations on Undivided Urban Corridors

Accession Number:

01632157

Record Type:

Component

Abstract:

Level of service (LOS) is the collective outcome of the quality of travel experienced by the user throughout the travel duration. The macroscopic parameters considered in Highway Capacity Manual seems inadequate to capture the variations in quality of travel perceived by the users in every moment (seconds). The study reported here aimed to develop the LOS criteria for automobiles on undivided urban corridors considering the variations in microscopic parameters which influence the quality of the travel over a period of time or distance. Detailed speed profile data were collected second-to-second basis on the selected urban corridors in the state of Kerala, India using a GPS-based mobile application installed in the test vehicles. Two-wheelers, three-wheelers, and cars were considered separately due to the variations in their static and dynamic characteristics which influences their manoeuvrability and LOS experienced under a given traffic condition. The coefficient of variation of speed (CV) and congestion index (CI) was estimated using the speed profile observed and found to be more reliable measures to evaluate the LOS. Two step clustering technique was used for evolving the level of service criteria based on speed ratio, CV, and CI. Non-linear regression models were developed and validated for predicting the microscopic parameters of traffic flow. Considerable variation is observed in the criterion values estimated for different vehicle types under the automobile category comparing with HCM 2010 values, and hence this new methodology can be used as a basis to assess the LOS from the individual drivers’ point of view.

Supplemental Notes:

This paper was sponsored by TRB committee AHB40 Standing Committee on Highway Capacity and Quality of Service.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-02343

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Manghat, Drisya
V, Aswathy K
Krishnamurthy, K

Pagination:

17p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Identifier Terms:

Highway Capacity Manual 2010

Geographic Terms:

Kerala (India)

Subject Areas:

Highways; Operations and Traffic Management

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-02343

Files:

TRIS, TRB, ATRI

Created Date:

Dec 8 2016 10:52AM