Last week, I looked ahead of me up the highway and saw a lot of tail lights; a gridlock was just developing. We got down to about 13 mph and I still couldn't see anything causing it. Finally I saw, over on the OTHER side of the freeway, a county truck parked well off the road, and two workers picking up trash. By the time I saw them, the speed was picking up to normal. Obviously, ONE idiot, way ahead of us, had slowed down to ogle the workers, causing about two hundred cars behind to slow to a crawl. It's amazing how just one driver can cause a major quagmire.