"More than 20 people in traffic accidents" could refer to a variety of incidents, but it's important to note that any number of injuries or fatalities in traffic accidents is concerning. Here are some general steps that can be taken in response to such incidents:

1. **Emergency Services**: Ensure that emergency services (ambulances, fire departments, and police) are notified immediately. They are trained to handle large-scale incidents and can provide the necessary medical attention and control traffic.

2. **Safety Measures**: If you are at the scene of an accident, ensure your own safety by staying away from the flow of traffic. Use hazard triangles or flares if available to warn other drivers.

3. **Medical Attention**: Check for injured individuals and provide basic first aid if you are qualified to do so. Do not move anyone who appears to be seriously injured unless there is an immediate danger.

4. **Documentation**: Document the scene by taking photos and noting down details about the vehicles involved, license plates, and contact information of witnesses. This information can be crucial for insurance claims and legal purposes.

5. **Reporting**: Contact local law enforcement to report the incident. Provide them with all the relevant information you have gathered.

6. **Support Services**: Large-scale accidents often require additional support services like counseling for those affected, both physically and emotionally.

7. **Prevention Efforts**: Analyze the causes of the accident to prevent future occurrences. This might involve improvements to road infrastructure, stricter enforcement of traffic laws, or public awareness campaigns.

If you are referring to a specific event or need more detailed guidance, please provide more context or specifics about the situation.