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Difficulty: Very hardMotorway Signs and Signals

You are driving a standard car at night in the left-hand lane of a motorway. The overhead matrix signs display the number '50' accompanied by flashing amber lights, but the number is not enclosed in a red circle. As you travel, you notice that the reflective studs on your immediate left have changed from red to green. Based on this combination of signals and markings, which of the following statements accurately describes your situation and legal obligations?

  1. A
    The green studs indicate you are adjacent to the central reservation. The 50 mph signal is an advisory maximum speed warning of a hazard.
  2. B
    You are passing an exit, slip road, or lay-by. The 50 mph signal represents a mandatory regulatory speed limit that you must not legally exceed.
  3. You are passing an exit, slip road, or lay-by. The 50 mph signal is an advisory maximum speed rather than a mandatory regulation.Answer
  4. D
    You are passing an exit, slip road, or lay-by. Since the 50 mph signal is only advisory, your mandatory maximum speed is the 60 mph national limit.

Answer

You are passing an exit, slip road, or lay-by, and the 50 mph signal is an advisory maximum speed rather than a mandatory regulation.
The correct answer accurately synthesizes two key pieces of motorway knowledge. First, green reflective studs replace the normal red edge studs to indicate that you are passing a slip road, exit, or lay-by. Second, a speed limit displayed on an overhead matrix sign without a red ring is an advisory maximum speed warning of a hazard, rather than a mandatory regulation.

Step-by-Step Solution

1
Identify the meaning of the green reflective studs on the left side of the motorway.
Green studs mark the boundary of slip roads, exits, or lay-bys.
This establishes the physical location and context of the vehicle, differentiating it from the standard red studs on the left edge.
2
Interpret the overhead matrix sign displaying '50' with flashing amber lights and no red circle.
The lack of a red circle means this is an advisory speed limit, not a legally enforceable mandatory limit.
Mandatory signs on motorways must be enclosed in a red circle; warning or advisory signs use flashing amber lights without the red circle.
3
Evaluate the underlying national speed limit applicable to the scenario.
Because the 50 mph limit is advisory, the legal maximum speed remains the 70 mph national speed limit for motorways.
Standard cars are subject to a 70 mph limit on motorways unless a mandatory regulatory sign indicates otherwise.

Key Concept

Synthesizing Motorway Signage and Road Markings
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Topics

Motorway Signs and Signals

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