Sometimes the simplest ideas are the best ones: we have multiple airbags in cars to protect the occupants in a crash but whenever a car hits a pedestrian there are severe injuries, why not have airbags on the outside of the car as well?
Well autoliv had that idea and they have come up with two systems:
Active Hood: where airbags push the rear part of a padded hood up in case of a collision, and
Pedestrian Protection Airbag: where airbags in the windshield pillars deploy protecting pedestrians from the glass.
If they can design it so it doesn’t look like a couch driving down the road I think autoliv are onto a winning idea.