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External airbags are not just a concept; they might soon make their way onto the roads in the next few years.
Check out this external airbag that can reduce the severity of an accident following collision with other cars or stationary object.
https://www.digitaltrends.com/cars/zf-external-side-airbag-reduces-severity-of-injuries-by-40-percent/
External car airbags can be a great way to save the lives of pedestrians or cyclists in the event of an accident.