SV128 In the United States, there are only three official tracks still in use. Protective fences are built around each track due to the extreme top speeds and the tremendous force exerted on the car can cause parts of the vehicle to fly off or break during a race. Drivers have three minutes to stop the race if they feel their car isn't performing correctly. For the new Imperial, a quality-assurance center was built adjacent to the Windsor plant where the car was assembled.|Motorola Moto G