Originally Posted by XwChriswX

The arrows really don't have anything to do with a threat. They just give you a general direction to look...

Which, if you need an arrow to pull your head out of the dash and out scanning front and back, then a radar detector isn't going to do you any good.

I am constantly scanning both oncoming and similarly flowing traffic curbs to see if there is a car on the side of the road, and the medians for those crossovers they love to park at. When my radar detector goes off, I get even more paranoid about it.