Under normal dry driving conditions, the UK Highway Code recommends maintaining a minimum … — UK Driving Theory Test

Under normal dry driving conditions, the UK Highway Code recommends maintaining a minimum separation gap of $2\text{ seconds}$ behind the vehicle ahead. In severe wintry conditions where the road surface is icy or covered in compacted snow, stopping distances can increase by up to $10\text{ times}$ . According to these safety rules, what is the minimum safe following time gap, in seconds, that a driver should allow on an icy road?

Answer: 20 seconds

Answer

The minimum recommended following time gap on an icy road is

20\text{ seconds}

Under Rule 126 and Rule 230 of the UK Highway Code, drivers must allow at least a

2\text{-second}

gap in dry conditions. In icy conditions, stopping distances can be up to ten times greater, requiring a corresponding minimum gap of

20\text{ seconds}

(

2\text{ s} \times 10

) to safely perceive and react to hazards.

Step-by-Step Solution

Determine the baseline following time gap under dry conditions.

Baseline time gap =

2\text{ seconds}

The UK Highway Code specifies the two-second rule as the safe separation gap on dry asphalt.

Identify the weather adjustment multiplier for ice and packed snow.

Multiplier =

10\times

Tyre grip is severely reduced on ice and snow, increasing stopping distances by up to ten times.

Calculate the safe following gap by multiplying the baseline gap by the icy weather multiplier.

2\text{ seconds} \times 10 = 20\text{ seconds}

To maintain an equivalent safety buffer, the separation time must scale proportionally with stopping distance.

Key Concept

Highway Code weather multipliers for safe separation and following distances

Estimated Time:45s

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