Now that I moved farther away from work, and am forced to take some gnarly freeways, Sigalert.com got very tiring. It has gaping holes on very important freeways, and is hard to read quickly.
Starting this week I found and started using Traffic.com. I set up a bunch of different routes I can take to work, and at a glance I can tell the best way to go. Pretty nifty, and it is free!