On a motorway, when should a driver use the hazard warning lights?

When slowing down quickly because of danger ahead.
When driving on the hard shoulder.
When towing another vehicle.
When another vehicle is following too closely.

Explantion: Use the hazard warning lights to warn other road users of a danger ahead. 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.

Theory Tester

On a motorway, when should a driver use the hazard warning lights?

Safe and Responsible Driving