In an argumentative essay about improving the safety of cars which would be the most relevant source?

The most relevant source for an argumentative essay on improving car safety would be peer-reviewed studies or reports from reputable organizations such as the National Highway Traffic Safety Administration (NHTSA) or the Insurance Institute for Highway Safety (IIHS). These sources provide empirical data and analysis on vehicle safety features, accident statistics, and the effectiveness of safety regulations. Additionally, research articles that explore advancements in automotive technology, such as collision avoidance systems, would also support the argument for improving safety.