I highly recommend using SigAlert. I have a GPS which I use all the time, but I like SigAlert because it is right on my computer and gives up to date info. I check the site before I leave work to figure to decide Freeway or Tollroad to get home.
Just go to http://www.sigalert.com/ and you can choose your freeway and it will give you how fast the freeway is moving at all the exits. Plus you can see any accidents and find alternate ways home.