5.3 Road Hazards and Mechanical Emergencies

Road Hazards and Mechanical Emergencies

Motorcyclists are highly vulnerable to changes in road surface conditions and sudden mechanical failures. A hazard that a passenger car would roll over without noticing—such as a patch of gravel, a wet utility hole cover, or a minor pothole—can easily destabilize a motorcycle and cause a crash. Understanding how to read the road, anticipate surface changes, and execute proper emergency maneuvers is a core competency tested on the Alberta Class 6 exam.

Road Surface Hazards and Riding Tactics

A rider must continuously scan the road surface 10 to 15 seconds ahead to identify hazards before reaching them. Traction changes require prompt, deliberate adjustments to speed, lane position, and body alignment.

1. Wet Roads and Hydroplaning

Traction on wet roads is reduced by approximately half. The most dangerous time to ride is during the first 15 to 20 minutes of rain. During this initial period, rain mixes with oil, grease, and rubber residue on the pavement surface, creating a highly slick film. As the rain continues, this mixture is washed away, and traction improves slightly, though it remains far below dry conditions. To ride safely in the rain:

• Avoid the center portion of the lane, as this is where motor vehicles drop oil and fluids. Ride in the tire tracks of the vehicles ahead.
• Reduce your speed and double your space cushion (following distance).
• Avoid sudden acceleration, hard braking, or aggressive leans.
• Beware of standing water to prevent hydroplaning (where tires lose contact with the road and ride on a layer of water).

2. Gravel, Sand, and Dirt

Gravel and sand behave like ice under motorcycle tires, eliminating lateral grip. If you must cross gravel or sand (such as in construction zones or on rural Alberta roads):

• Reduce speed before reaching the loose surface.
• Keep the motorcycle completely upright. Do not lean.
• Maintain a steady throttle. Avoid sudden acceleration or braking.
• Avoid using the front brake on loose gravel, as a front-wheel lockup is likely.

3. Railway Tracks and Metal Surfaces

Metal bridge gratings, utility hole covers, and railway tracks become extremely slippery when wet.

• Railway crossings: Cross tracks at as close to a 90-degree angle as possible to prevent the tires from getting caught in the track grooves. If you must cross at an angle, make sure it is at least 45 degrees, and do not make sudden steering adjustments or applications of the brake while on the metal tracks.
• Metal surfaces: Maintain a steady throttle, keep the motorcycle upright, and coast across.

4. Potholes, Bumps, and Debris

If you cannot steer around a pothole or debris:

• Slow down as much as possible before impact.
• Release the brakes just before striking the object. This allows the suspension to expand and absorb the impact.
• Rise slightly off the seat, standing on the footpegs with your knees and elbows bent to act as natural shock absorbers.
• Keep a firm grip on the handlebars and hold a straight path.
• Keep the throttle steady or roll it open slightly just before impact to lighten the front end.

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Mechanical Emergencies

Mechanical failures on a motorcycle require rapid, calm responses to prevent a loss of control.

1. Tire Blowouts (Flat Tires)

A sudden puncture or blowout will cause the motorcycle to handle erratically.

• Do NOT apply the brakes immediately. Braking on a flat tire can cause the tire to slide or dismount from the wheel rim, leading to an immediate crash.
• Keep a firm grip on the handlebars to maintain control against the pulling forces.
• Gradually ease off the throttle to slow down.
• Maintain a straight line and shift your body weight away from the flat tire (e.g., if the rear tire is flat, sit slightly forward).
• Once the motorcycle has slowed significantly, steer gently to the side of the road and brake very lightly to stop.

2. Stuck Throttle

If your throttle cable sticks open or the electronic throttle malfunctions:

• Immediately flip the engine cut-off (kill) switch to stop engine power.
• Pull in the clutch lever simultaneously to disengage the engine from the rear wheel, preventing the motorcycle from accelerating.
• Apply both brakes smoothly and guide the motorcycle to a safe stopping area on the shoulder.
• Do not attempt to restart the engine until the throttle mechanism has been inspected and repaired.

3. Practical Wobble (Tank Slapper)

A high-speed wobble occurs when the front wheel begins to shake rapidly from side to side. It is typically caused by improper cargo loading, low tire pressure, or mechanical misalignment of the steering head or wheels.

• Do NOT apply the brakes. Braking will shift weight forward, worsening the instability.
• Keep a firm grip on the handlebars, but do not try to fight or force the wobble to stop.
• Roll off the throttle gradually to reduce speed.
• Lean forward over the gas tank to transfer weight to the front wheel and lower the center of gravity, which helps damp the oscillation.
• Once the wobble stops, pull over safely to inspect the motorcycle.

Airborne Objects

Insects, stones, and debris thrown by other vehicles can strike you while riding. Adjust lane position when possible to move away from the hazard stream. Always wear adequate eye and face protection. Without face protection, airborne objects can cause severe pain and loss of vision. A windshield helps, but it is not a substitute for a face shield or goggles. Even with a shield, insects can smear the visor and stones can crack it—slow down and clean or replace damaged eye protection rather than riding half-blind.

Animals

Animal behaviour is unpredictable. If an animal is near the road, reduce speed and be prepared to steer around it or stop. Animals are often more active at dusk and dawn. Some dogs chase motorcycles: if a dog runs toward you from the front or side, reduce speed and downshift, then accelerate away as the dog approaches, keeping both feet on the footpegs so you retain control. Never kick at an animal—kicking destabilizes the motorcycle.