Amazon’s fully autonomous Zoox vehicles got approval Thursday to begin charging customers for rides in the specially designed cars that feature four inward-facing seats once they secure state and local approval. The National Highway Traffic Safety Administration also proposed a rule last month to allow robotaxis to operate without brake pedals, but that proposal is still pending. Most vehicle safety regulations were written decades ago, always with the assumption that there would be a human driver behind the wheel. But Morrison said that things like steering wheels, windshield wipers and side-view mirrors aren’t really needed in an autonomous vehicle. Most companies don’t report how many miles their autonomous vehicles drove, which makes it impossible to calculate a crash rate, according to the IIHS.