14. A vehicle that has to be built to national safety standards from tires to roof
With saftey of the public as the main goal virtually every system in that car is regulated as to make it less dangerous to both its occupants and to anyone else who comes in touch with it. It starts at the tires, continues through the sheetmetal and computer controls and even effects what fumes come out the car's several vents and exhausts. We regulate the hell out of how cars are built and how they are designed.