Thanks for the responses so far, guys. I'm probably going to leave Phoenix at 9:00 in the morning, so I can beat the rush hour traffic here. I don't want to leave too early, don't want to fall asleep on the road either!

That means I'll probably be getting into LA (first stop is USC) around 3-4:00, so I'll probably get stuck in traffic no matter how I do it.

I'm not exactly sure who to believe on the "stick strictly to the speed limit" vs "go with the flow" debate-- but people argue about that same issue here. I just wanted to know if CA has any special laws or anything regarding speeding that differ than other states. Generally I go the speed limit on rural highways (because you never know who's hiding on the side of the road), maybe just a tad over, and I go with the flow on urban freeways. Also... are the roads pretty well lit up and easy to see at night?