Photo: Ken Lund, CC BY-SA 2.0, via Wikimedia Commons
Drowsy driving in Canada is treated as a form of impairment. Alberta’s government says plainly that driving while tired is impaired driving, and in the Northwest Territories police can give you a 24-hour roadside suspension if they have reasonable grounds to suspect you are fatigued. If you notice the warning signs below, the only real fix is to get off the road and rest.
Warning signs that you are too tired to drive
Ontario’s MTO handbook lists eight signs that drowsiness has reached a dangerous level. In plain terms:
- You struggle to keep your eyes open.
- Your head keeps nodding forward.
- Your mind wanders and you cannot concentrate.
- You keep yawning.
- You cannot remember the last few kilometres.
- You miss traffic lights or signals.
- You drift into the next lane and jerk back.
- You drift off the road and only just avoid a crash.
Ontario says if you have even one of these, you may be about to fall asleep, and research shows you can fall asleep without being aware of it.
Other handbooks add earlier clues:
- Saskatchewan: an early sign is that you stop scanning properly and stare straight ahead instead of looking well down the road.
- Alberta: fatigue can leave you unable to react to something on the road, taking bigger risks, reacting more emotionally or aggressively, and closing your eyes for longer.
- Nova Scotia: “highway hypnosis” can leave you disoriented and drowsy on long, steady drives.
Is drowsy driving illegal in Canada?
| Jurisdiction | What the official source says |
|---|---|
| Alberta | Driving while tired is impaired driving. Being awake for 17 to 19 hours is equivalent to a blood alcohol content of 0.05%. |
| Northwest Territories | Driving fatigued is considered impaired driving. You can be issued a 24-hour roadside suspension if there are reasonable grounds to suspect you are fatigued (Motor Vehicles Act, section 116.1). |
| Ontario | The handbook says tired drivers can be as impaired as drunk drivers, with slower reactions and less alertness. |
| Manitoba | The handbook compares being drowsy or “half asleep” to a drugged condition. |
| Other provinces | Check your provincial handbook. Do not drive when tired. |
For alcohol, drugs and roadside suspensions, see impaired driving in Canada for new drivers.
Who is most at risk, and when?
- Time of day: Ontario says drowsiness crashes tend to happen late at night and early morning (2 a.m. to 6 a.m.) and in the late afternoon (2 p.m. to 4 p.m.).
- Shift workers: Ontario lists shift workers, people with undiagnosed or untreated sleep disorders, and commercial drivers as higher risk. If you think you may have a sleep problem, ask your doctor.
- Long, steady drives: Saskatchewan warns the chance of falling asleep is high on long straight roads; Manitoba says drowsiness usually comes from steady driving or starting out tired.
- New drivers: driving still takes a lot of concentration when you are learning, and several provinces restrict late-night driving for new drivers. Compare those rules in Canadian graduated licensing compared.
What makes fatigue worse
The NWT manual lists causes: lack of sleep, emotional stress, boredom, long periods of driving, physical activity, sickness and eye strain. It adds that overeating, alcohol or drugs, warm sunshine, a warm car and carbon monoxide from a leaky exhaust can all increase the effect. Have your exhaust checked whenever the car is serviced.
What actually helps
- Start rested. Every handbook puts this first.
- Take breaks. The NWT manual says stop and walk around your vehicle at least once every two hours.
- Share the driving. Saskatchewan: change drivers when you start to feel tired.
- Nap somewhere safe. Ontario: park in a safe, secure place such as a well-lit rest stop or truck stop, lock the doors, close the windows and sleep.
- If you must stop by the road: Manitoba says pull well over and turn on your four-way flashers so you are not hit.
- Keep the car comfortable and ventilated, keep your eyes moving, and wear sunglasses on bright days (NWT).
- No cruise control when overtired (Nova Scotia).
What does not work
Ontario is clear that stimulants are never a substitute for sleep. Caffeine helps briefly, but if you are short of sleep the effect wears off quickly. Turning up the radio or opening a window does not work either. Saskatchewan’s handbook makes the same point about caffeine: the effect can wear off suddenly, and the only remedy for fatigue is to pull off the road and sleep. Rumble strips on some Saskatchewan highways can alert you that you have drifted, but by then you are already too tired to be driving.
A quick plan for a long trip
- Sleep properly the night before. Avoid starting a long drive after a night shift.
- Plan stops every two hours or so, and pick rest areas in advance.
- Travel with another fully licensed driver if your licence rules allow it, and swap regularly.
- Avoid the 2 a.m. to 6 a.m. window if you can.
- At the first warning sign, stop. Do not try to push on to the next town.
Night driving brings its own risks: see night driving in Canada. For the full licensing path, start with learning to drive in Canada.
Sources
- Government of Ontario, “The Official MTO Driver’s Handbook: Dealing with particular situations” (ontario.ca)
- Government of Alberta, “Preventing impaired driving” (alberta.ca)
- Government of the Northwest Territories, “NWT Driver’s Manual: Basic” (idmv.inf.gov.nt.ca)
- SGI, “Saskatchewan Driver’s Handbook” (sgi.sk.ca)
- Manitoba Public Insurance, “Manitoba Driver’s Handbook: Drowsiness or Fatigue” (apps.mpi.mb.ca)
- Government of Nova Scotia, “Driver’s Handbook” (novascotia.ca)