FREE and you can download it HERE.
I got it the other day and it has saved my bacon more than once. All you have to do is click on the app and you can pull up weather alerts, traffic jams, traffic cameras and maps. But that's not all. It will tell you how long the accident has been there, how long it will be there, which lanes are closed, and which lane to switch to if you're already stuck in the mess. You can know which roads to avoid due to weather issues ect. It's awesome!
If you travel I15 at all, you know what a pain all the construction can be. With this app you can know what you're up against before you're stuck in a jam. Plus, it's FREE! You can't beat that. Just click HERE to download it from itunes. (also available for Droid)