Answer:
Speeding up roads,highways combined with long hours fatigue.
Explanation:
According to NHTSAA (National Highway Traffic Service Administration Agency) the one of the most frequent accidents caused for speeding up the highway or road induced as a result of fatigue for working overtime, lack of driving skills or lack of attention for stress is one or a combination of several  elements of peril which; in turn, unfortunately needs a lot of consideration when an EMT gets to conduct the emergency vehicles or even another driver causing it for these or any other circumstances.