I understand your concern about traffic accidents involving more than 20 people. Traffic accidents of this scale can have devastating impacts on communities. Some key points to consider:

- These major incidents often involve multiple vehicles and can block roadways for extended periods
- They frequently result in numerous injuries and fatalities
- Emergency services must coordinate a large response effort
- Investigations are needed to determine the cause and liability
- There may be questions around road design, vehicle safety, driver behavior, etc.
- Impacts can last for days/weeks in terms of congestion, investigations, etc.
- Major crashes like this tend to receive significant media coverage

The exact response would depend on the specific details, but major multi-fatality/multi-injury crashes require a comprehensive coordinated approach from many agencies and officials. Let me know if you need any other information or context about how these situations are typically handled.