The National Highway Traffic Safety Administration (NHTSA) noted that the Buick had "underrun" the trailer—a common occurrence in rear-end collisions with heavy trucks at the time. To prevent such tragedies, the government eventually mandated that all semi-trailers be equipped with rear underrun guards. Today, these steel bars are still colloquially known as Legacy and Aftermath
While the official full autopsy report for Jayne Mansfield is not typically released to the public as a single downloadable document, the findings of the Orleans Parish Coroner’s Office have been widely reported. Mansfield died on June 29, 1967, following a car accident on Highway 90 in Louisiana. Official Cause of Death jayne mansfield autopsy report