Google patents human flypaper for self-driving car crashes The patent describes an “eggshell-like” coating that would protect the adhesive layer during normal driving conditions. Only the force dealt by a collision would be enough to break it, catching the pedestrian near-instantaneously.

Such a system would soften the initial blow, but more importantly, it would also stop pedestrians from being thrown forward by the vehicle. Secondary impacts, caused by hitting the tarmac or another object, such as a car, can often be just as dangerous, if not more so than the original collision.