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Difficulty: MediumMotorway Signals and Reflective Studs

An overhead electronic signal on a motorway displays the number 50 accompanied by flashing amber lights in each corner, without a surrounding red ring. What does this signal indicate to drivers?

  1. A
    A legally enforceable mandatory speed limit of 50 mph is now in effect
  2. An advisory maximum speed limit of 50 mph is recommended due to a hazard aheadAnswer
  3. C
    A minimum mandatory speed of 50 mph must be maintained to prevent traffic congestion
  4. D
    The lane is closing in 50 metres and traffic must immediately merge into the adjacent lane

Answer

An advisory maximum speed limit of 50 mph is recommended due to a hazard ahead
Flashing amber lights on an overhead motorway gantry or roadside matrix signal indicate that there is a hazard ahead, such as an incident, adverse weather, or queuing traffic. When a number is displayed alongside flashing amber lights without a solid red ring, it represents an advisory maximum speed that drivers should follow for safety.

Step-by-Step Solution

1
Identify the signal lighting configuration and symbol formatting
The display features flashing amber lights surrounding the number 50 with no red circle
Distinguishing between amber flashing matrix signals and red circular borders determines regulatory status
2
Apply UK Highway Code rules for amber motorway matrix signals
The signal provides an advisory recommendation rather than a statutory mandatory order
Flashing amber lights warn drivers of upcoming hazards such as fog, incidents, or queuing traffic and advise a safe speed

Key Concept

Distinction between advisory amber motorway signals and mandatory red-ring speed limits
Estimated Time:45s
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Topics

Motorway Signals and Reflective Studs

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