&gt; The biggest thing is that people drive when they shouldn&#x27;t.<p>It is <i>extremely</i> common to drive beyond your actual &quot;in complete control&quot; speed.<p>You are supposed to drive slowly enough in snow so that you can correct for unexpected patches of black ice or rocks in the snow slush. You are supposed to leave a long enough gap to be able to react and stop if the car in front of you unexpectedly fully slams on their brakes. You are supposed to drive slowly enough to stop if a kid runs out between parked cars.<p>Humans almost never do, because unexpected things almost never happen. Traffic flows faster and perhaps smoother, because we willingly accept driving at speeds where we can avoid most, but not all hazards.<p>But if we expect self-driving cars to always put safety first, then we will find them to be &quot;tediously&quot; slow, even if they have better sensors and faster reaction speed than us.