When you encounter an injured person in a traffic accident, the first thing you should do is **check their breathing, pulse, and consciousness**. This is crucial to assess their condition and determine if they need immediate medical attention.

- **Check breathing**: If the injured person does not respond or move, they may be unconscious. In this case, it is essential to verify if they are breathing.

- **Check the pulse**: This will help you know if the injured person's heart is functioning properly.

- **Verify consciousness**: If the injured person responds by answering or moving, it means they are conscious. In this case, you should not move them, but you should observe them to detect any changes in their condition.

It is important to remember that **you should not move the injured person** unless it is absolutely necessary to put them in a safe place. Also, **you should not give them drinks, food, or medication**, as this could worsen their situation.

Finally, the transport of the injured person to the hospital should only be done in exceptional situations, such as when the accident occurs in an isolated place or if emergency services take a long time to arrive. In general, it is better to wait for an ambulance to ensure safe and proper transport.