Ministry of Transportation / Ministère des Transports
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VI. Dealing with emergencies
Emergency warning devices and procedures

Every commercial motor vehicle on a provincial highway from one-half hour before sunset to one-half hour after sunrise must have a sufficient number of the following emergency warning devices:

  • Flares, lamps or lanterns capable of continually producing two warning lights, each visible from a distance of at least 150 metres (500 ft.) for at least eight hours or
  • Portable reflectors

Whenever any commercial motor vehicle or trailer is disabled, stalled, broken down or in a collision, the driver should quickly and calmly take the necessary actions to safeguard the vehicle and other motorists.

If the vehicle can be moved, move it as far off the roadway as safely possible — this should not affect the police officer’s investigation. This is especially important on busy or high-speed roads where it may be dangerous to leave vehicles in the driving lanes.

    1. Turn on your vehicle’s emergency flashers/hazard warning signals.
    2. During times when visibility is limited, your vehicle’s low-beam headlights must be turned on.
    3. In a speed limit zone greater than 60 km/h, if you cannot move your commercial vehicle off the roadway, you are required to set out one type of emergency warning device approximately 30 metres (100 ft.) to both the front and rear of your vehicle during times when visibility is limited.
    4. It is recommended to use emergency warning devices for all emergencies, whether they occur during the day or night, or on-road or off the road, to ensure everyone’s safety.

Note: Times of limited visibility are from one-half hour before sunset to one-half hour after sunrise, and any other time of poor light conditions, such as fog, snow or rain, which prevents clear visibility of people or vehicles less than 150 metres away. Do not park or leave your vehicle on a roadway unless it is not practical to move it off the roadway, or unless there is a clear view on the roadway for at least 125 metres (400 ft.) in both directions. Whenever the view of your vehicle is blocked by a hill, curve or other obstruction within 150 metres (500 ft.), an additional warning signal should be placed to give ample warning to other highway users.