A comparison of older drivers’ driving patterns during a naturalistic on-road driving task with patterns from their preceding four-months of real-world driving

S. Koppel, P. Y. Liu, D. Griffiths, P. Hua, R. M. St. Louis, K. Stephan, D. B. Logan, M. Di Stefano, P. Darzins, M. M. Porter, B. Mazer, I. Gélinas, B. Vrkljan, S. Marshall, J. L. Charlton

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This study compared older drivers’ driving patterns during a naturalistic on-road driving task (i.e., eDOS driving task) with their real-world driving from the preceding four-month period. Two hundred and eight participants (Male: 68.8%; Mean age = 81.5 years, SD = 3.3 years) completed the eDOS driving task in their own vehicle which commenced from their home and followed a self-selected route. Participants’ driving patterns were collected via an in-car recording device that was installed in their vehicle. This study examined the sub-trip from participants’ homes to their first destination during the eDOS driving task. The median sub-trip distance was 4.4 km (Q1 = 2.8, Q3 = 6.4). Across the four-month period of real-world driving, participants completed a median of 151 driving trips from their home (Q1 = 103.0, Q3 = 202.7), with a median trip distance of 2.7 km (Q1 = 1.1, Q3 = 5.8). Most participants’ eDOS driving task trip distance was classified as representative of their real-world driving trip distances (95.2%). By mapping GPS coordinates for driving pattern data with road types and roadways, most eDOS driving task trips included roadways that were actively used during their real-world driving (85.0%). During the preceding four-month period of real-world driving, most participants had visited the first nominated destination during the eDOS driving task at least once per month (77.4%). Given the increasing international interest and use of modified (local area) licences, these findings suggest that naturalistic on-road driving tasks could be used by licensing authorities to assess potentially at-risk older drivers within their own driving environments.

Original languageEnglish
Article number104652
Number of pages9
JournalSafety Science
Publication statusPublished - May 2020


  • Electronic Driver Observation Schedule (eDOS)
  • Naturalistic on-road driving task
  • Older drivers
  • Real-world driving
  • Road safety

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