10.2 Reduced Traction: Slippery Surfaces, Gravel, Railway Tracks, and Hydroplaning

What Traction Is and Why It Disappears

Traction is the grip between your tyres and the road. A motorcycle needs it for three things at once: accelerating, braking, and steering. When the surface gets wet, loose, or slippery, there's less grip to share among those three, and any sudden demand — a hard brake, a quick steering input, a handful of throttle — can exceed what's available and break the tyre loose.

The rider's job on a low-traction surface is to ask for less, and ask for it smoothly. Slow down before the slippery patch, keep the throttle steady, brake in a straight line, and make every steering input gentle.

ICBC's own framing is prevention first: you avoid losing traction by scanning well ahead, which is also how you find escape routes. If you cannot avoid the problem, don't panic — slow down and avoid sudden movements.

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Slippery Surfaces

Urban roads are full of low-traction traps that are invisible when dry and nasty when wet. Learn to read the surface ahead of you.

Common Slippery Hazards

• Wet paint — lane lines, crosswalks, and directional arrows are painted with a glass-bead paint that's slicker than the surrounding asphalt, especially when wet. Ride around painted markings, not over them, when possible.
• Wet leaves — a layer of wet autumn leaves is as slippery as ice; they pack under the tyre and eliminate grip. Avoid leaf-filled patches, especially in shaded corners.
• Mud — farm approaches, construction sites, and rural driveways often drop mud onto the road. Treat any mud strip as a no-brake, no-throttle zone.
• Oil — the centre of the lane, especially near intersections and in the left tyre track, collects oil dripped by idling cars. The first rain after a dry spell lifts this oil to the surface. Ride in the wheel tracks (where car tyres have swept the road) rather than the oily centre.
• Metal surfaces — manhole covers, metal expansion joints on bridges, and railway crossing plates are extremely slippery when wet. Cross them in a straight line with the bike upright and no throttle or brake changes.

Riding Technique on Slippery Surfaces

1. Slow down before the slippery section — once you're on it, a hard brake will slide the tyre
2. Keep a steady throttle — don't accelerate or decelerate mid-patch
3. Brake in a straight line, before or after the hazard, not on it
4. Make smooth steering inputs — no quick countersteer or sudden lean changes
5. Keep a relaxed grip — tense arms transmit every twitch straight to the front wheel

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Unpaved and Irregular Surfaces

Gravel roads, construction zones, and broken pavement reduce grip and bounce the bike around. The surface is loose, so the tyre can't grip the way it does on clean asphalt — and the irregular surface moves the bike under you, which feels unstable.

Gravel Road Technique

• Keep speed steady and moderate — not so fast that the bike floats, not so slow that it wanders and stalls
• Look where you want to go, not at the gravel immediately in front of the wheel — the bike follows your eyes
• Keep inputs smooth — no sudden throttle, brake, or steering changes; a handful of throttle on gravel can spin the rear wheel out
• Hold a relaxed but firm grip — let the bars move under you rather than fighting them
• Brake early and use engine braking — downshift and let the engine slow the bike; use the brakes gently and mostly with the front, in a straight line
• Stand slightly on the pegs on rougher sections — this lets your legs absorb the bumps and keeps the bike more stable

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Railway Tracks

Railway tracks combine two hazards: a smooth, slippery metal surface and a raised rail that can catch a tyre. The safest crossing is one that lets you hit the rails at a right angle.

How to Cross Railway Tracks

• Cross at as close to 90 degrees as possible — if the tracks angle across your lane, steer to meet them square; a tyre that runs along a rail can be pulled off line
• Stand on the pegs and let your legs absorb the bump — keep the bike stable over the raised rail
• Look both ways before crossing — a train can't stop for you, and quiet crossings are the most dangerous
• Slow down before the tracks, then roll on with a steady throttle — no braking or accelerating on the rail itself
• Keep the bike upright — don't lean or steer mid-crossing
• Watch for a second track — many crossings have two or more rails; don't relax after the first one

Exam point: The 90-degree crossing rule is the single most-tested railway fact. If a question describes tracks that angle across the road, the correct response is to steer so you cross them square, not to brake hard or speed up.

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Hydroplaning

Hydroplaning happens when a layer of water builds up under the tyre faster than the tread can push it away. The tyre lifts off the road and rides on a wedge of water — and you lose all grip for steering, braking, and acceleration. It's the most dangerous traction failure because there is no warning and no recovery until the tyre touches down again.

How to Prevent and Handle Hydroplaning

• Reduce speed in standing water — the faster you go, the more water the tyre has to clear and the more likely it is to float
• Avoid puddles — if you can see standing water, go around it or slow down well before you reach it
• Keep your tyres in good condition — worn tread can't channel water; check tread depth regularly
• Keep inputs smooth — don't brake, accelerate, or steer hard through water; a sliding tyre on a water wedge will slide farther
• If you do hydroplane, ease off the throttle gently, keep the bike upright and pointed straight, and don't touch the brakes until the tyre grips again

Exam point: Hydroplaning is about speed and water depth, not about rider skill. The correct response is to slow down before standing water and avoid puddles — not to ride through them and hope.

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Traction Management Summary

The rule for every row is the same: slow before the hazard, keep inputs smooth, and never ask the tyre for more grip than the surface can give.