distracted driving       
noun [ U ] US uk/dɪˌstræk.tɪd ˈdraɪ.vɪŋ/ us/dɪˌstræk.tɪd ˈdraɪ.vɪŋ/
 不专心开车,开车时分心
the practice of driving while doing something else, for example using a mobile phone
  A recent Automobile Association of American study confirmed that distracted driving causes most accidents. 美国汽车协会最近的一项研究证实,大多数交通事故是因为司机开车时分心造成的。 
 - More examples
 - We believe the best solution to distracted driving is to educate motorists about its hazards.
 - Young men are at highest risk of car accidents, often involving distracted driving, speeding, alcohol, or drugs.
 - Distracted driving is not just about cell phones - it may involve eating or using a map.
 - a public-awareness campaign targeting teens about the dangers of distracted driving