In the event of a traffic accident, it is important that **basic life support actions** are performed by **specialized personnel**. However, if a person present at the scene of the accident is **completely sure they know and can perform** these techniques, they may also intervene.

- **Act with caution:** If you are not sure how to perform first aid maneuvers, it is better not to touch or move the injured, as you could worsen their injuries. Instead, provide emotional support and wait for emergency services to arrive.

- **Cardiopulmonary resuscitation (CPR):** If a person is not breathing normally, CPR can be initiated. This involves performing chest compressions and mouth-to-mouth ventilations. However, these actions should only be performed if you are sure how to do them correctly.

- **Wait for emergency services:** It is crucial to stay with the injured and follow the instructions of the emergency services when they arrive at the scene of the accident.

In summary, although specialized personnel are the most suitable to perform these actions, a trained person who is confident in their abilities can intervene in emergency situations.