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Question 15

Dense fog limits a driver's clear view to a short stretch of road even though the posted limit is 80 km/h. How should the driver choose speed?

  1. Slow enough to stop within the distance that is visibleCorrect answer
  2. Maintain 80 km/h because driving below the sign is unsafe
  3. Use 80 km/h until another sign lowers it
  4. Match the fastest visible vehicle

Explanation

The driver must adapt to the sight distance and be able to stop within the roadway that can actually be seen. A posted maximum is not a promise that the maximum remains safe in fog, so simply holding 80 km/h ignores the reduced stopping margin.

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Question 15: Dense fog limits a driver's clear view to a short stretch… · Driving in Ontario: Essential Class G Road Rules · Questena