• 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

Capacity Models for Long-Term and Short-Term Freeway Work Zones in Germany

Author/Presenter: Von der Heiden, Nina; Geistefeldt, Justin
Abstract:

The paper presents results from a comprehensive study of work zone capacity on German freeways. A large number of long-time work zones with and without a reduction of the number of lanes as well as short-term work zones with temporary lane closures were included in the analysis. Data from loop or radar detectors upstream of the work zones were analyzed. For the capacity estimation of long-term work zones, both deterministic and stochastic methodologies were applied. It turned out that the methods for stochastic capacity analysis performed better than the conventional approach of estimating the capacity in the speed-flow diagram due to the short analysis periods covering work zone implementation. For short-term work zones, valid capacity estimates could only be determined for the post-breakdown queue discharge flow. The estimated capacities were analyzed regarding the influence of the prevailing traffic, geometric, and control conditions in the work zone. Relevant parameters are the number of lanes, the lane widths, the existence of divided lanes, the longitudinal gradient, the share of commuters, and the percentage of heavy vehicles. For short-time work zones, also the side of the lane closure (left or right lane) turned out to influence the capacity. As a result of the study, comprehensive capacity models for both long- and short-term work zones, which can be applied in work zone planning procedures, are provided.

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; Short-term Stationary; 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