Match each driving scenario and speed condition to its corresponding UK Highway Code stopp… — UK Driving Theory Test

Match each driving scenario and speed condition to its corresponding UK Highway Code stopping or following distance requirement.

Driving at $50\text{ mph}$ on a dry, clear dual carriagewayOverall stopping distance of $53\text{ metres}$ ( $175\text{ feet}$ )
Following a vehicle ahead while driving in heavy rain and surface waterA minimum separation gap of at least $4\text{ seconds}$
Driving at $30\text{ mph}$ in good, dry road conditionsThinking distance of $9\text{ metres}$ ( $30\text{ feet}$ ) and braking distance of $14\text{ metres}$ ( $45\text{ feet}$ )
Driving on a road surface covered with compacted snow or iceOverall stopping distance that can increase by up to $10\text{ times}$

Answer

Driving at

50\text{ mph}

on a dry dual carriageway matches an overall stopping distance of

53\text{ metres}

(

175\text{ feet}

); following in heavy rain matches a minimum separation gap of at least

4\text{ seconds}

; driving at

30\text{ mph}

in dry conditions matches a thinking distance of

9\text{ metres}

and braking distance of

14\text{ metres}

; driving on ice or snow matches an overall stopping distance increase of up to

10\text{ times}

Each condition matches its exact UK Highway Code standard: travelling at

50\text{ mph}

in dry conditions produces a total stopping distance of

53\text{ metres}

(

175\text{ feet}

); wet weather doubles the following gap from two to four seconds; driving at

30\text{ mph}

is composed of

9\text{ metres}

thinking distance and

14\text{ metres}

braking distance; and icy conditions can increase stopping distances up to ten times normal dry distances.

Step-by-Step Solution

Calculate the total dry stopping distance for a vehicle travelling at

50\text{ mph}

Thinking distance (

15\text{ m}

) + braking distance (

38\text{ m}

) =

53\text{ m}

(

175\text{ ft}

Highway Code Rule 126 specifies exact stopping distance tables for dry conditions.

Determine the mandatory following time gap adjustment for wet road surfaces.

The standard dry gap of

2\text{ seconds}

is doubled to at least

4\text{ seconds}

Water reduces tyre traction and doubles stopping distance, necessitating twice the buffer time.

Separate the components of the total stopping distance at

30\text{ mph}

in dry conditions.

Thinking distance is

9\text{ m}

(

30\text{ ft}

) and braking distance is

14\text{ m}

(

45\text{ ft}

Total stopping distance (

23\text{ m}

) is the sum of human reaction distance and vehicle braking distance.

Identify the extreme weather multiplier applied to icy and snowy surfaces.

Stopping distance can increase by up to

10\text{ times}

(

20\text{ second}

gap).

Ice almost entirely eliminates tyre traction, requiring up to tenfold distance to come to a complete halt.

Key Concept

UK Highway Code stopping distance components (thinking vs braking distances) and weather-related following distance multipliers.

Question

Answer

Step-by-Step Solution

Key Concept

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