The key driving test data that our company adapts to the car bus through EST558 terminal: gear position, steering angle, width lamp, rear fog lamp, speaker, speed and other information, widely used in driving and driving test field, driving and training end The data is used for driver training, which can directly feedback the driver's current driving situation, correct the driver's wrong driving habits and improve the driving pass rate. The driving test can reduce the pressure of the invigilator and improve the efficiency of the test.