The Effects of Medical Conditions on Driving Performance

Shifts in the age distribution of the population will result in increased numbers of older drivers in the coming decades. Older adults are projected to drive more and to continue driving longer than previous cohorts. Most older adults are capable and conscientious drivers, but some develop medical conditions that may interfere with their functional abilities, including those that support safe driving. The objective of this study is to explore the effects of a variety of medical conditions common among older adults on their driving performance and exposure. Participants with conditions selected for the study, as well as a control group of similar age, will complete a professional driving evaluation. All participants will allow the research team to install instruments in their vehicles that will collect driving exposure data. These data will document the extent to which drivers with various medical conditions restrict their driving exposure. The data collected from this study will be supplemented with data from drivers with self-reported medical conditions in the 2nd Strategic Highway Research Program (SHRP2) naturalistic study. The findings from this study will allow the National Highway Traffic Safety Administration (NHTSA) to provide guidance to medical professionals who advise their older patients in decisions related to driving.

  • Supplemental Notes:
    • See "The Effects of Medical Conditions on Driving Performance" (DOT HS 812 439; August 2017).


  • English


  • Status: Completed
  • Funding: $695956.00
  • Contract Numbers:


  • Sponsor Organizations:

    National Highway Traffic Safety Administration

    1200 New Jersey Avenue, SE
    Washington, D.C.  United States  20590
  • Project Managers:

    Sifrit, Kathy

  • Performing Organizations:

    TransAnalytics, LLC

    336 West Broad Street
    Quakertown, PA  United States  18951
  • Principal Investigators:

    Sifrit, Kathy

  • Start Date: 20110429
  • Expected Completion Date: 0
  • Actual Completion Date: 20170801
  • USDOT Program: Behavioral Safety Research
  • Subprogram: Older Driver

Subject/Index Terms

Filing Info

  • Accession Number: 01490701
  • Record Type: Research project
  • Source Agency: National Highway Traffic Safety Administration
  • Contract Numbers: DTNH22-09-D-00135
  • Files: RiP
  • Created Date: Aug 29 2013 1:01AM