I can't say I utilize many Facebook applications . . . I guess you can blame it on the fact that the hotness rating ones got a little nauseating?! But I do love tools and applications that make your life easier, like this Facebook traffic cam aggregator app called TrafficLand.
With this new application, you'll be able to check out live images from local traffic cams, so you know exactly how much traffic there is.
And if you aren't a Facebook user, you can always use Google Maps to predict traffic conditions for you!