Ministry of Transportation / Ministère des Transports
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IV. Driving at night and in bad weather

A skid may happen when one or more tires lose their grip with the road’s surface. Skids most often happen on a slippery surface, such as a road that is wet, icy or covered with snow, gravel or some other loose material. Most skids result from driving too fast for road conditions. Hard braking and overly aggressive turning or accelerating can cause your vehicle to skid and possibly go out of control.

To avoid a skid on a slippery road, drive at a reduced speed and operate the vehicle’s controls in a smooth and constrained manner. Increasing tire forces, such as by braking or accelerating while steering may push tires even closer to a skid condition. It’s essential that the vehicle’s speed be maintained at a safe level and that turns be made gently.

If your vehicle begins to skid, try not to panic – it is possible to maintain control of your vehicle, even in a skid. Ease off on the accelerator or brake and, on a very slippery surface, slip the transmission into neutral if you can. Continue to steer in the direction you wish to go. Be careful not to oversteer. Once you regain control you can brake as needed, but very gently and smoothly.

Anti-lock Brakes — If your vehicle is equipped with anti-lock brakes, practise emergency braking to understand how your vehicle will react. It is a good idea to practise doing this under controlled conditions with a qualified driving instructor.

Anti-lock braking systems (ABS) are designed to sense the speed of the wheels on a vehicle during braking. An abnormal drop in wheel speed, which indicates potential wheel lock, causes the brake force to be reduced to that wheel. This is how the anti-lock braking system prevents tire skid and the accompanying loss of steering control. This improves vehicle safety during heavy brake use or when braking with poor traction.

Although ABS helps to prevent wheel lock, you should not expect the stopping distance for your vehicle to be shortened.

Drivers unfamiliar with ABS may be surprised by the pulsations that they may feel in the brake pedal when they brake hard. Make sure you know what to expect so you will not be distracted by the pulsation or tempted to release the pedal during emergency braking manoeuvres.

Threshold Braking — Threshold braking should bring you to a reasonably quick, controlled stop in your own lane, even in slippery conditions. This technique is generally practised in a vehicle that is not equipped with ABS. Brake as hard as you can until a wheel begins to lock up, then release pressure on the pedal slightly to release the wheel. Press down on the brake pedal, applying as much braking force as possible without inducing a skid. If you feel any of the wheels begin to lock up, release the brake pressure slightly and re-apply. Don’t pump the brakes. Continue braking this way until you have slowed the vehicle to the desired speed.

Vehicles equipped with ABS should provide controlled braking, on slippery surfaces automatically. Press the brake pedal hard and allow the system to control wheel lock up.