Shifts, duration of work and accident risk of bus drivers.

This paper contains the results of a repetitive and comprehensive analysis of accidents of bus drivers, highlighting different aspects of the aetiology of bus drivers' accidents. The results presented in this paper indicate a strong effect of the type of shift on accident risk. Shifts starting in the morning appeared to have a higher risk than shifts starting in the afternoon. Furthermore a certain association could be detected within each type of shift, with the starting hour of the service reflecting the influence of the starting condition of the worker. The paper continues with the analyses of the pattern of accident risk during the course of various types of shift. A characteristic pattern can be demonstrated, namely that accident risk during the early shift is relatively low at the beginning of task operation, reaches a peak at about the third or fourth hour of service, followed by a decline and then another increase during the last hours of task operation. Accident risk during the late shift is rela...

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