Advanced Search
MyIDEAS: Login

Assessing URET Benefits for Airspace Users: A Quasi-Experimental Approach

Contents:

Author Info

  • Bolic, Tatjana
  • Hansen, Mark
Registered author(s):

    Abstract

    Air traffic control organizations around the world are trying to develop automation tools to help controllers manage increasing workload and to enable user preferred routes. This paper focuses on such a tool: User Request Evaluation Tool (URET), which is a decision-support tool for en-route controllers. URET is a prototype of an automated conflict probe. Based on flight plans and actual radar tracks, the URET system models aircraft trajectories and predicts possible conflicts. It also enables controllers to check clearances for conflicts prior to their issuance. This tool is intended as a strategic decision-support tool for the D-side controller. When implemented in the Air traffic control system, tools like URET can affect many aspects of system performance, from controller workload, to safety, to the quality of service provided to users. The purpose of this paper is to determine the impact of URET on users--more specifically on flight times experienced by users. To do so, we employ statistical methods that compare changes in flight times before and after URET implementation for two sets of flights. One set includes flights that traverse the airspace where URET is implemented; the other includes flights that do not use that airspace. Results suggest that URET reduces flight times for flights using the URET airspace. Departure delay, rather than airborne time, is the flight time component that is most strongly affected, with a decrease of 0.5-3 minutes per flight depending on the analysis approach and time period analyzed. Airborne time reductions are in the range of 0.2-0.5 minutes per flight under one analysis approach, and statistically insignificant under the other approach. These results imply that much of the benefit from URET is non-local and derives from mechanisms other than more direct routing through URET airspace, which has been the focus of most earlier benefits studies.

    Download Info

    If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
    File URL: http://www.escholarship.org/uc/item/99h0s0rt.pdf;origin=repeccitec
    Download Restriction: no

    Bibliographic Info

    Paper provided by Institute of Transportation Studies, UC Berkeley in its series Institute of Transportation Studies, Research Reports, Working Papers, Proceedings with number qt99h0s0rt.

    as in new window
    Length:
    Date of creation: 01 Apr 2002
    Date of revision:
    Handle: RePEc:cdl:itsrrp:qt99h0s0rt

    Contact details of provider:
    Postal: 109 McLaughlin Hall, Mail Code 1720, Berkeley, CA 94720-1720
    Phone: 510-642-3585
    Fax: 510-643-3955
    Email:
    Web page: http://www.escholarship.org/repec/its/
    More information through EDIRC

    Related research

    Keywords:

    References

    No references listed on IDEAS
    You can help add them by filling out this form.

    Citations

    Lists

    This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

    Statistics

    Access and download statistics

    Corrections

    When requesting a correction, please mention this item's handle: RePEc:cdl:itsrrp:qt99h0s0rt. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Lisa Schiff).

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If references are entirely missing, you can add them using this form.

    If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.