In recent years, various expenses such as oil price, road maintenance fee, bridge crossing fee and labor cost have increased, which makes the transportation cost keep high, but the transportation price is stable and changing, even showing a downward trend. In order to cover these heavy costs, car owners and drivers try their best to drive in the middle of the night, which is the time when fatigue driving is most likely to occur, or to drive vehicles continuously to avoid a checkpoint of a traffic control department, causing fatigue driving.<br>
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