Unsafe driver, unprofessional and vulgar response. Our car slowed to 50 mph to enter a 45 mph zone and the Navigator Pilot Car driver illegally passed on the right in a no-passing zone while flipping us off. Got a photo of the license plate ZGE7468 at the next intersection; driver was shouting and flipping us off again. Phoned the number on the truck to report and turned out to be the driver, who harassed me, lied about the situation, told me to "get a life," and swore at me repeatedly. A real class act. Would give 0 stars if I could.