This is why you never see self-driving car prototypes playing in the snow

We're a lot farther from general use self-driving driving cars than those in Silicon Valley would like you to believe.  The radar sensor in the front and the rear camera are completely covered. While the snow was falling, I had to turn off the parking assist because the falling snow was triggering the ultrasonic sensors causing the system to beep continuously while there was nothing around the vehicle.?