>It's also illegal to do this, so it's not a valid edge-case. Road signs can get dirty or damaged. There definitely are edge-cases where a self-driving car mig

>It's also illegal to do this, so it's not a valid edge-case. Road signs can get dirty or damaged. There definitely are edge-cases where a self-driving car might not comprehend an imperfect sign which a human would read just fine. Maybe this test in particular isn't fair, but it does raise questions.