The new airbag design will fix the biggest problem with modern automotive crash testing and make cars vastly safer.While this might not seem like a problem, in the event of a crash, smaller occupants can easily slip underneath the belt in what is termed 'submarining.'Well, according to patents filed with the USPTO discovered by CarBuzz, Hyundai and Kia have found a way to fix this problem, making cars safer than ever with a new seat-mounted airbag for… your crotch.While other manufacturers have tried metal framework to prevent submarining, and some have used knee and side-mounted seat airbags to curtail the effects, these only minimize the damage done rather than eradicate it in its entirety.The upright support section will ensure that the occupant is held securely in position, the horizontal section deploys over the occupant's thighs to ensure that they remain restrained on the seat, and the tethers will inhibit sideways movement of the occupant's legs, further reducing the risk of injury."