Mobile app-based study of driving behaviors under the influence of cannabis.
Smart health June 1, 2025 Honglu Li, Bin Han, Cong Shi et al.
Cannabis use correlates with altered driving behaviors such as weaving, swerving, wide turning, and hard braking, with significant effects appearing roughly 2 to 3 hours after consumption. Using participants' smartphones to gather motion sensor data in natural settings, a two-step segmentation algorithm and threshold-based methods detected these behaviors efficiently. On-road experiments with 9 participants who consumed cannabis under controlled conditions revealed the link, addressing limitations of simulator-based studies that lack real-world complexity and scalability.