I didn't miss the point, I just don't think that's a meaningful number. What's meaningful is total throughput and each individual's time on the road. The 10 sec

I didn't miss the point, I just don't think that's a meaningful number. What's meaningful is total throughput and each individual's time on the road. The 10 second gap doesn't much affect either. Also, presumably they'll close the gap or leave the road at some point, at which time cars could (shouldn't) speed up and save their 8 seconds. But it's that kind of stupidity that causes the traffic waves anyway, to save 8 seconds.