Why do Freeways (Chruches) come to an annoying hault?

I read this interesting article, and then applied it to church.

1. Someone in front slows to 50mph (i.e. to avoid a car swerving in front of him)
2. The next driver slows to 45 to keep a safe distance away.
3. Drivers farther back see brake lights and begin to slow down
4. The pattern continues and more drivers apply their brakes until traffic is at a crawl.
5. By the time the rear drivers catch up to the source of the shockwave, the offending parties are long gone, and there is no sign of what started the problem.

What if we applied this to churches...