IDEAS home Printed from https://ideas.repec.org/p/cdl/itsdav/qt07t6b5xj.html
   My bibliography  Save this paper

Leveraging the California Highway Incident Processing System for Policy and Research

Author

Listed:
  • Waetjen, David PhD
  • Shilling, Fraser PhD

Abstract

There are two official sources of data on traffic incidents in California: 1) the Statewide Integrated Traffic Records System (SWITRS), intended to include incidents leading to injury or death; and 2) the California Highway Patrol (CHP) data on Caltrans’ Performance Measurement System, PeMS. Traffic safety researchers rely heavily on the post-processed SWITRS database, which provides only some crucial information about crashes. In 2015, the Road Ecology Center at UC Davis developed a third method to collect all incident data that appear on the CHP real-time incident-reporting web-site (https://cad.chp.ca.gov/). These data are assembled into a database called CHIPS, for California Highway Incident Processing System. Analyses indicate that the number of incidents recorded in a given period are similar in CHIPS and SWITRS but lower in PeMS. Also, many SWITRS records (e.g., 36% in 2018), but no CHIPS records, lack or have inaccurate location information on incidents. Through case studies, the research group examined three ways that CHIPS can be used to support data and policy analysis. This report proposes future pathways for creating a more integrated system for collecting and analyzing crashes.

Suggested Citation

  • Waetjen, David PhD & Shilling, Fraser PhD, 2020. "Leveraging the California Highway Incident Processing System for Policy and Research," Institute of Transportation Studies, Working Paper Series qt07t6b5xj, Institute of Transportation Studies, UC Davis.
    • Handle: RePEc:cdl:itsdav:qt07t6b5xj
    as

    Download full text from publisher

    File URL: https://www.escholarship.org/uc/item/07t6b5xj.pdf;origin=repeccitec
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:cdl:itsdav:qt07t6b5xj. See general information about how to correct material in RePEc.

    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.

    We have no bibliographic references for this item. You can help adding them by using 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 RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Lisa Schiff (email available below). General contact details of provider: https://edirc.repec.org/data/itucdus.html .

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

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.