From Shannon Swanson on the Disney Parks Blog:
For this point-of-view video, a camera was mounted on the driver’s side of a Radiator Springs Racers car during a recent test run in Cars Land at Disney California Adventure park. Vehicles are being tested seven days a week, mostly at night. By the time each vehicle is commissioned, it will travel approximately 36,000 miles per year!
The video also shows a quick sneak peek of what to expect inside the mountain range. Guests will get to see the entire track for themselves when the attraction opens on June 15.