Traffic was only an issue the day I arrived late, around 3pm. Normally, we take 52, but at that time they had shut it down at I think Madison. Took forever to reroute, thanks to the complete lack of signage.
Thanks Claw. When you say "forever", what do you mean? I still have nightmares about the 4 hours it took me to get to the fest from Palm Springs in 2008, leaving the hotel at 2 PM. I haven't had a single day that bad since, but that day is always on my mind when I'm getting ready to go.