A total of 73 bike helmets have earned a 5-star rating for concussion protection from Virginia Tech since the ratings were launched in 2018.
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Catalytic converters from older Prius models command high prices on the scrap market.
Only one out of 20 small SUVs earns a good rating in a new, more stringent side-impact test designed to further reduce crash fatalities.
The far-reaching legislation draws on IIHS-HLDI work on crash avoidance, truck underride, headlights, alcohol impairment and other subjects.
For decades, IIHS has been a leader in finding out what works and doesn't work to prevent motor vehicle crashes from happening in the first place and to minimize injuries in the crashes that still occur.