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

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

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?

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