Hazard Warning Lights : Knowing the Rules of the Road

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Highway Code Rule 116

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Rule 116 ↗
Hazard warning lights. These may be used when your vehicle is stationary, to warn that it is temporarily obstructing traffic. Never use them as an excuse for dangerous or illegal parking. You MUST NOT use hazard warning lights while driving or being towed unless you are on a motorway or unrestricted dual carriageway and you need to warn drivers behind you of a hazard or obstruction ahead. Only use them for long enough to ensure that your warning has been observed.

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Hazard Warning Lights : Knowing the Rules of the Road

When Stationary

While Driving or Being Towed

Warning of Temporary Obstructions

Hazard lights may be used when your vehicle is stationary to warn others that you are temporarily obstructing the flow of traffic .

The use of hazard warning lights is governed by this specific regulation to ensure road safety and consistency .

Generally Prohibited While Moving

You MUST NOT use hazard warning lights while the vehicle is in motion or being towed under normal circumstances .

The Motorway Exception

Usage is permitted on motorways or unrestricted dual carriageways to warn following drivers of a hazard or obstruction directly ahead .

Use for Limited Duration

When used on high - speed roads , keep them on only long enough to ensure your warning has been observed by those behind you .

Critical Restrictions

Not an Excuse for Illegal Parking

Hazard lights must never be used as a justification for dangerous or lilegal parking maneuvers .

Avoid Misleading Other Drivers

Misusing hazard lights can confuse other motorists regarding your Intentions or the actual state of traffic .