If you're a motorist, chances are one of these little scenarios will sound familiar.
You're on virtual auto pilot on your daily commute home, hardly aware of the last few kilometres you drove. Or you've zoned out and don't notice the vehicle in front of you has slowed, forcing you to slam on your brakes.
Or maybe you're on a long, tedious highway drive, willing your eyelids to stay up but unwilling to pull over because you want to make more time, not noticing how you're drifting in and out of your lane.
While impaired driving and, more recently, distracted driving get most of the headlines as road-safety scourges, driver fatigue is a more insidious threat and probably much more common.
It was brought into stark relief this week when a Quebec coroner compared drowsy driving to driving under the influence in an inquest into a 2011 collision where a van carrying farm workers home hit a school bus full of children, killing five in the van.
[ Related: Quebec coroner compares driving drowsyRead More »from Drowsy drivers are a bigger danger than you think