My beloved need some traffic info because he was making the big trek, to Culver City, and didn't want to be stuck in traffic, again. I found a few sites for up to the minute traffic problems but I liked this one the best. Sigalert
The site also has a button for "Routes." You can select your start and destination and it gives you a suggestion for alternate routes, how long it should take, and the number of miles. If I traveled the freeways a lot this would be the best reason for an IPhone. If you don't have such a device it's also good to check before you head out.