The first things you must keep in mind in an accident are, in this order...

Correct answer: self-protection, protection of the accident scene, and protection of the victims.

Protection has three parts, in this order. First, protect yourself, because if you are hit by a vehicle, there will be one more victim. Then protect the scene and mark it to prevent further crashes. Finally, protect the victims from further harm, such as traffic or fire. In the image, a man wearing a vest is next to a car stopped off the roadway, with the V-16 on its roof.

Comportamiento y primeros auxilios en caso de accidente de tráfico