I was heading to the midnight showing of Friday the 13th (Number 1), btw most of the cast showed up, director, special effects guy, so it was wicked cool.
After I turned out of my house, I started getting some crazy KA alert and my spec display was going nuts. 34.59, 34.70, 35.49, 35.44, 34.69, 34.68, it was just rotating those. About 3 miles later I see some blue lights flashing and what do you know the state police had setup a little road block, and had left all their KA units on full blast.
It ended up being 3 patrol cars with front / back ka units. So if you ever encounter anything like this I'd say there is about a 95% chance it's either a really bad wreck, or it's a road block. So just whip a u-turn and take the alternate route