[djaychela]

Helmets in cars aren't without issue, though. They restrict your vision and situational awareness via hearing. I was a rally driver for about 10 years, and the MSA (UK Motorsport body) banned drivers on road sections from wearing helmets - both because it was a PR nightmare, but also because of the issues with vision (in full face helmets) and hearing (although I appreciate many people have loud music on in cars, or wear headphones, etc).

Also, you really -want- to have a helmet on in a race car - you'll typically have an unpadded roll cage right by your head, and the FIA-approved padding for roll cages is designed to work well with helmets, not with heads. I used to dread long road sections on rallies as I knew that an accident would be a real mess if there was any contact with the cage. There's more room in a road car, and there's padding / airbags etc to cushion you from impact on hard structures.