The Impact of Perceived Stress on the Driving Performance of Car Drivers: a Simulator Study

Abstract

Stress and driving are closely linked, yet little attention has been given to how stress affects driving behaviour in routine road sections and predictable road conditions (e.g., predictable speed limit changes). This study addresses this gap and explores the impact of prolonged stress on driving behaviour in routine road sections and predictable transitions between speed limits. A total of 27 drivers participated in a car driving simulator experiment, which compared their driving performance in a baseline and stressful scenario. Stressors such as time pressure and hazardous events were added in the stressful scenario. Stress was self-reported using a Stress Visual Analogue Scale. Results showed a minor but significant increase in speed in stressful circumstances, both in low-speed and high-speed segments. Drivers also tended to accelerate sooner or brake later in speed limit transition zones, and their accelerating and braking was harsher. As even minute changes in driving behaviour can impact fatality risks, more attention should be given to mental health in traffic and transportation, both in research and in policy.