• Skip to primary navigation
  • Skip to main content
Logo

Work Zone Safety Information Clearinghouse

Library of Resources to Improve Roadway Work Zone Safety for All Roadway Users

  • About
  • Join Listserv
  • Contact
  • Twitter
  • Facebook
  • LinkedIn
  • Work Zone Data
    • At a Glance
    • National & State Traffic Data
    • Work Zone Traffic Crash Trends and Statistics
    • Worker Fatalities and Injuries at Road Construction Sites
  • Topics of Interest
    • Commercial Motor Vehicle Safety
    • Smart Work Zones
    • Transportation Management Plans
    • Accommodating Pedestrians
    • Worker Safety and Welfare
    • Project Coordination in Work Zones
  • Training
    • Flagger
    • Online Courses
    • Toolboxes
    • FHWA Safety Grant Products
    • Certification and
      Accreditation
  • Work Zone Devices
  • Laws, Standards & Policies
    • COVID-19 Guidance
  • Public Awareness
  • Events
  • About
  • Listserv
  • Contact
  • Search
Publication

Micro-Level Analysis on Traffic Flow Parameters at Work-Zone Road Section Using Vehicular Trajectory Data

Author/Presenter: Kumar, Pallav; Raju, Narayana; Arkatkar, Shriniwas S.; Joshi, Gaurang J.
Abstract:

The research work is carried out to examine microscopic and macroscopic traffic parameters at work zone on high speed urban roads. Due to construction of elevated metro rail project over the study section, having five-lanes in one direction, two-lanes are reduced (since past six months). The traffic data are collected using videography, later, trajectory data is extracted using semi-automated image processing software, under different flow conditions, for with and without work zone scenarios. Time-space plot for with and without work zone scenarios clearly indicates substantial decrement in slope due to construction work zone. Longitudinal speeds of the vehicles under work zone scenarios is decreased significantly, compared to without work zone scenarios. Further, lane utilization behavior under different flow conditions also shows vehicles movement closer to work zone side lane is highly affected under low flow conditions. Hysteresis plot of leader-follower vehicles also shows the increased cautiousness of the drivers at work zone location, as they maintain consistent relative velocity with respect to its leader to avoid rear-end crashes. The concept of perceiving time for driver is proposed in the present study with its basis from hysteresis plot which furthers assessment of chances rear-end crashes. It is found that bikes (motorized two-wheeler) are most vulnerable to rear-end crashes at work zone scenario. Finally, speed-flow relationship developed using Van Aerde model for two scenarios, shows reduction in capacity by about 43%, due to lane drops. It is expected that, outcome of the present study may be useful in exploring traffic operations at the location of work zone, more precisely.

Source: Transportation Research Board 97th Annual Meeting, January 7-11, 2018, Washington DC
Publisher: Transportation Research Board
Publication Date: 2018
Source URL: Link to URL
Notes:

Can be ordered on the website above.

Publication Types: Books, Reports, Papers, and Research Articles
Topics: Lane Closure; Mathematical Models; Rear End Crashes; Traffic Data; Traffic Flow; Traffic Speed; Vehicle Following; Work Zone Capacity

Copyright © 2023 American Road & Transportation Builders Association (ARTBA). The National Work Zone Safety Information Clearinghouse is a project of the ARTBA Transportation Development Foundation. It is operated in cooperation with the U.S. Federal Highway Administration and Texas A&M Transportation Institute. | Copyright Statement · Privacy Policy · Disclaimer
American Road and Transportation Builders Association Transportation Development Foundation, American Road and Transportation Builders Association U.S. Department of Transportation Federal Highway Administration Texas A&M Transportation Institute