A new study has the attention of Michigan highway safety experts.
The study, conducted by the Michigan State Police's office of Highway Safety Planning shows that in one year "distracted" drivers caused 4,200 accidents.
The biggest segment of those distracted drivers, 1,100, were classified as tired or sleepy.
That category beat our cell phone users who cause accidents, 823 talkers caused accidents.
The Highway Safety Planning office says it wants to see at least two or three more years of data before it decides whether or not cell phones are road hazards. Until then, the jury is out.