If your self-driving car lacks the scene understanding to notice a kid's about to run out from behind that truck, chasing that ball - safer to be on the freeway

If your self-driving car lacks the scene understanding to notice a kid's about to run out from behind that truck, chasing that ball - safer to be on the freeway, where there are no kids chasing balls. Or if your self-driving car struggles with tight corners, or complex junctions? You won't see many of those on the freeway. On the other hand, if your self-driving car suffers random failures to stop, unexpected swerving or a propensity to hit into stationary objects - I agree lower speeds would be safer.