Older drivers do not have a high crash risk - a replication of low mileage bias

  • Published: Accid Anal Prev; 38(3): 574-8, 2006
  • Authors: Langford, J., Methorst, R., & Hakamies-Blomqvist, L.
  • Date Added: 04 Feb 2014
  • Last Update: 04 Feb 2014
  • Format: html


The aims are of this study are as follows:

  • To demonstrate the association between annual distance driven and crash involvement;

  • To determine whether there is an association between age of driver and crash involvement, controlling for annual distance driven.


Survey participants were selected from the Dutch Periodical Regional Traffic Safety Survey. 8569 respondents received a questionnaire in 2004 with questions about traffic issues and behaviour for the year 2003.

Data from the 1990–1995 and 1997, 1999, 2001 and 2003 travel surveys was also obtained and combined to determine the crash rates for different age groups.

Key Findings:

  • Different driver age groups cannot be validly compared for crash involvement, if crash rates have been calculated solely on the basis of distance travelled.

  • The present study has shown that after being matched for yearly driving distance, most drivers aged 75 years and above were safer than younger age groups.

  • Only low mileage older drivers (just over 10% of older drivers in the survey) indicated a relatively high self-reported crash rate.


Older drivers; Low mileage bias; Crash risk