The IIHS has shown that crash deaths decrease as vehicle size increases. Outside of just simple physics, the Insurance Institute for Highway Safety (IIHS) has done extensive research that demonstrates crash deaths decreasing as vehicle size increases—despite considerable improvements in vehicle safety systems. Citröen AmiMarioGuti // Getty ImagesTranslating to “friend,” Citröen’s Ami is a fun electric city car designed to scurry around city traffic without making a sound. Despite its size, Renault’s electric city car is surprisingly safe, with an airbag (for the driver), four-point seatbelts, and a genuine tubular chassis. Perhaps it was just too expensive to be a city car, and not capable enough to venture outside the city limits.