The phrase "to become a driver" means to learn how to operate and drive a vehicle, typically by undergoing training or obtaining a license. Full definition
Wouldn't it be ironic if self - driving liability becomes the driver for the end of the personal automobile? (treehugger.com)
It boosts the lows to the point where the bass becomes the driver of most songs where it's present, but it does well to not overwhelm the rest of the mix. (businessinsider.com)