You don't need only flat surface detection, but it should be the highest priority safety check. And it should be the primary check. We shouldn't turn onto one-

You don't need only flat surface detection, but it should be the highest priority safety check. And it should be the primary check. We shouldn't turn onto one-way streets, of course! Just like we shouldn't swerve off streets when we detect something that can be spoofed ... such as the false positives shown in the article and the false negatives given by other Tesla crashes. You can actually correct those instances by using reliable ranging devices with dense enough sampling to ensure flat surfaces without intermediate obstacles. To say that there are no other factors at play is foolish, of course, but it's also foolish to say that somehow we shouldn't be doing this.