The most comparable 3.25-day Independence Day period occurred in 2022, when 464 people were killed in traffic crashes. Weekend Independence Day celebrations often extend beyond one day, increasing vehicle miles traveled and allowing drinking to continue across multiple nights. Saturday accounted for more than 22% of DUI-related crashes recorded between 2018 and 2022, followed by Sunday at 20%. During the 2024 Independence Day holiday period alone, 579 people were killed on U.S. roads. Population-adjusted data shows that Montana and South Dakota had the highest July Fourth traffic fatality rates between 2015 and 2024.