Visibility Blocker
An object blocking your line of sight — a truck, fence, bush. Anything could be behind the blocker.
What is it
A visibility blocker is anything that obstructs your line of sight: a truck, bus, parked van, fence, bushes, or a hill crest. Behind it could be a pedestrian, a child, or a turning vehicle. What you can't see is the most dangerous thing on the road.
How it happens
A rider travels alongside parked cars or behind a truck. The view is blocked. A car, pedestrian, or obstacle suddenly appears from behind the blocker. Reaction time — minimal. Most urban crashes involve restricted visibility.
How to reduce the risk
- Behind every blocker, danger ALWAYS exists — ride as if it's there
- Reduce speed near any visibility blocker
- Shift lane position for a better view (but not into oncoming traffic)
- Cover the brake — finger on the lever, ready to stop
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Related terms
Perception Error
Misjudging speed, distance, or the intention of another road user. The number one cause of crashes.
Target Fixation
Involuntarily staring at an obstacle instead of the safe path — and riding straight into it.
Blind Spot
An area around a vehicle where the driver cannot see you — not in mirrors, not in peripheral vision.
Left Turn Danger
A car turns left across your path — the most common type of motorcycle collision.
Car Door Opening
A driver or passenger opens a parked car door directly into a motorcyclist's path.
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Target Fixation
Involuntarily staring at an obstacle instead of the safe path — and riding straight into it.