In which cases, in order to mark the vehicle, is it necessary to turn on the hazard warning lights and place the emergency stop sign or a flashing red lantern at a distance from the vehicle?

• 1In the event of a traffic crash.
• 2During the boarding and alighting of organized groups of children from a vehicle marked with the "Children" identification sign.
• 3During a forced stop in places with limited sightlines of the road (in at least one direction less than 100 m).
• 4Answers 1 and 3.
• 5Answers 1, 2, and 3.