Monotonous tasks

• Conclusions
• Individual characteristics including medical conditions
• Internal body clock
• Lack of sleep or poor sleep
• Time-on-task
• What causes driver fatigue?

Monotonous tasks

A task is monotonous when its stimulants don't change or the changes are predictable or there is a high level of repetition. Suburban highways where road environment changes are limited and there is a small volume of traffic match this definition. O'Hanlon and Kelly [84] pointed out that driving on a monotonous road is equal to a vigilance task, thus driver vigilance decrement is an expression of fatigue. Thiffault & Bergeron [104] found that in a monotonous driving situation, driver steering wheel movement is greater and occurs more often, showing that the fatigue effect and effect on driver vigilance caused by a monotonous road situation is relatively large. Also, driving on a relatively long and monotonous driving environment also has a clear negative effect on driver valid peripheral visual field [95].