First, ahhh, Malibu.
Next, traffic cops.
Maybe you're not at work today, but you know who is? A lot (a lot) of traffic cops all up and down PCH. Though chances are the roads here will be too clogged for speeding, if you do open up the throttle, the odds of getting an expensive ticket (particularly on the hill near Ralphs) are pretty good. So slow down. Open the windows, take a deep breath and drink in the view.