One use of hazard warning lights which is allowed briefly is if you have to stop abruptly on a motorway or unrestricted dual carriageway for an obstacle but there is not a vehicle immediately behind you.
Hazard warning lights on motorway.
If your vehicle breaks down on a motorway drive it to the hard shoulder and switch on the hazard warning lights to warn following traffic.
Call for assistance from a motorway emergency phone or using a mobile phone call the gardaĆ.
When it is safe to do so get out of the vehicle and move behind the barrier.
Different countries use hazard warning lights in different ways.
Use the hazard warning lights to warn other road users of a danger ahead.
When it is recommended to use hazard warning lights whilst driving.
Activating hazard warning lights provides drivers behind that a hazardous situation is ahead.
Different countries use hazard warning lights in different ways.
Whilst driving on motorways and dual carriageways at high speed reaching hazards or obstructions ahead happens quickly.
The highway code also states that hazard warning lights should not be used while driving or being towed.
The rules on when you should use hazard warning lights are more limited when you re driving or being towed.
The only exceptions to this rule are if you are on a motorway or unrestricted dual carriageway and you need to warn drivers behind you of a hazard or obstruction ahead.
They are also called hazard flashers and hazard lights.
For example if you have to slow down sharply because of a build up of traffic ahead you can use the hazard warning lights to warn following vehicles that they need to slow down.
In new zealand we wouldn t use them on a motorway to warn other drivers that we re slowing down but in the uk this is recommended.