Do they compare like-for-like driving conditions and roadways? If it's just autopilot versus not-autopilot, that's flawed. People don't turn on autopilot in urb

Do they compare like-for-like driving conditions and roadways? If it's just autopilot versus not-autopilot, that's flawed. People don't turn on autopilot in urban environments, for example, where accidents are more likely.