How many unreported traffic collisions per year and what is the source?

Estimates suggest that there are around 50% to 70% of traffic collisions that go unreported each year, though exact figures can vary widely by region. In the United States, for example, the National Highway Traffic Safety Administration (NHTSA) reports millions of traffic accidents annually, but studies indicate that many minor accidents are not documented. Sources for this information include traffic safety studies and reports from government agencies like the NHTSA and the Federal Highway Administration.