Psychosocial variables related to transit safety: The application of catastrophe theory

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Abstract
This research applied a paradigm for the study of occupational safety and health risks in manufacturing settings to the risks associated with urban and regional transit operation. Subjects were 290 transit operators who completed a questionnaire measuring safety management, danger ratings, beliefs about accident control, work experience, physical stress, social stress, anxiety, environmental hazards, transit hazards (assaults and insults upon the operator, the need to reprimand passengers for various infractions, etc.), vehicle crashes and operator injuries, and alcohol and drug use. Principal findings were that operator injuries were most closely associated with transit hazards, which were more frequent at night and on the least desirable routes. Injuries occurred in a climate of elevated stress and anxiety which may have hampered the operators' ability to respond effectively to potentially dangerous situations. The cusp catastrophe model provided a non-linear dynamic explanation for accident occurrence and was more accurate (R = 0.71) for modelling accident incidence than the next best linear alternative (R = 0.51).