Abstract : This research explores how environmental stressors impact logistics efficiency among truck drivers in Thailand. The study particularly examines driving fatigue and cognitive impairment as connecting factors in this relationship. A total of 538 truck drivers participated in the survey through a validated questionnaire. The collected data underwent analysis using descriptive statistics and Partial Least Square Structure Equation Modeling (PLS-SEM). Results reveal that environmental stressors reduce logistics efficiency in Thai truck drivers through a chain reaction process. Environmental stressors first trigger driving fatigue in drivers. This fatigue subsequently leads to cognitive impairment. Finally, cognitive impairment causes decreased logistics efficiency. The connection between fatigue and cognitive impairment proves particularly strong and represents a crucial element in this sequence. The combined impact of environmental stressors, driving fatigue, and cognitive impairment accounts for 35.2% of the variance in logistics efficiency (R2 = 0.352). Statistical analysis confirms that driving fatigue and cognitive impairment function as sequential mediating variables linking environmental stressors to logistics efficiency. The proposed research model shows solid predictive capability and yields meaningful results. These outcomes effectively demonstrate how environmental challenges translate into operational performance issues within the trucking industry. The findings offer practical insights for enhancing logistics efficiency by addressing environmental stressors and supporting driver’s wellbeing.

Keyword : Cognitive impairment, driving fatigue, environmental stressor, logistics efficiency, truck driver.