Why? It provides an lower boundary on the human response time. It's significant because the ideal response already represents _at least a whole car length_ of t

Why? It provides an lower boundary on the human response time. It's significant because the ideal response already represents _at least a whole car length_ of travel distance. We don't even need to delve into what a realistic response time is: it's already so bad that we should be looking at alternatives like our machine-overlord-self-driving-cars.