Utvärdering av trötthetsvarningssystem i buss

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Previous studies have shown that it is common for bus drivers in public transport to struggle to stay awake several times a month. Several systems for detecting fatigue in drivers are currently available, but how these types of systems affect and are perceived by bus drivers is not known. The purpose of the study was to evaluate a fatigue warning system for use in long-distance buses. The study comprises two sub-studies; a survey and an on-road evaluation of the fatigue warning system. The survey showed that the factors that were considered the most tiring were driving at night, irregular working and sleeping hours and spread-over shifts/long time since a break. 29% of the drivers stated that they had to fight to stay awake when driving a bus 2–4 times/month or more. The on-road study showed that self-rated sleepiness was slightly lower when the fatigue warning system was active. The logs of fatigue events from the fatigue warning system and the drivers' reports of received warnings did not match their perceived fatigue. The drivers were generally positive about the fatigue warning system but emphasized that the system needs to be more reliable.

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