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Question

Difficulty: MediumFog and Poor Visibility

You are waiting at a T-junction to turn onto a major road in dense fog, where visibility is severely restricted. What safety precaution should you take before emerging?

  1. A
    Flash your headlights continuously to signal that you have priority to turn
  2. Wind down your window to listen for approaching traffic before pulling outAnswer
  3. C
    Follow closely behind another vehicle as it emerges across the junction
  4. D
    Accelerate quickly into the junction to minimize the time spent across traffic lanes

Answer

Wind down your window to listen for approaching traffic before pulling out.
According to The Highway Code (Rule 235), when approaching a junction where visibility is severely restricted by fog, you should stop in the correct position, open a window to listen for approaching traffic, and only emerge when you are entirely certain it is safe to do so.

Step-by-Step Solution

1
Assess the severe limitations of forward and lateral sightlines caused by thick fog at the junction.
Visual cues alone are insufficient to confirm that the major carriageway is clear.
Dense fog diffuses light and drastically shortens visual range, hiding oncoming vehicles until they are dangerously close.
2
Apply the Highway Code rule for emerging at junctions with severely limited visibility.
Stop at the give-way or stop line, lower the driver's window, and listen intently for traffic sounds before moving off.
Auditory observation provides critical information about approaching vehicles when sight is heavily obscured.

Key Concept

Observation techniques and junction procedures in dense fog (Highway Code Rule 235)
Estimated Time:45s
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Topics

Fog and Poor Visibility

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