Did you ever find yourself stuck in a horrible traffic jam which suddenly dissipates?
No exits, accidents, or construction is in sight, the traffic just disappears. Makes you feel like you just stepped out of the Twilight Zone.
This happened to us several times on the drive from Maryland.
(Pictured above is the truck that road our ass until he was able to cut out in front. The road was full of radar police and I sure hope one of them got this guy.)