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Difficulty: Very hardSpeed Limits

You are travelling in a standard passenger car on an unlit road outside a built-up area. The carriageway has a single traffic lane in your direction, and the opposing traffic flow is separated by a physical central reservation. A circular white sign with a black diagonal stripe is displayed. What is the maximum permitted speed limit for your vehicle?

  1. 70 mphAnswer
  2. B
    60 mph
  3. C
    50 mph
  4. D
    30 mph

Answer

70 mph
The defining characteristic of a dual carriageway is the physical central reservation separating the opposing traffic flows, not the number of lanes. Because the road has a central reservation and displays the national speed limit sign, the maximum permitted speed for a standard solo passenger car is 70 mph.

Step-by-Step Solution

1
Identify the road type based on the presence of a central reservation.
The road is classified as a dual carriageway.
According to the Highway Code, a dual carriageway is defined by the presence of a physical central reservation separating the carriageways, not by the number of traffic lanes.
2
Interpret the meaning of the road sign described.
The national speed limit applies.
A circular white sign with a black diagonal stripe is the official traffic sign indicating that the national speed limit applies to the road.
3
Determine the national speed limit for the specific vehicle and road combination.
The limit is 70 mph.
For a standard solo passenger car on a dual carriageway, the national speed limit is 70 mph.

Key Concept

Dual carriageway definition and national speed limits
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Topics

Speed Limits

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