I was driving to a meeting yesterday, and got stuck in traffic behind a landscaper's truck.It was nicely branded – logo, phone number, and landscaper's license number all there on the truck. 

While I was sitting there, I started wondering whether the new cell phone laws in California have affected the effectiveness of having your phone number on your vehicle. People can't see a number and pick up the phone immediately – they have to make sure they have a headset and all that sort of thing. Does that result in the companies that have on-car branding getting fewer calls?