You said -- "I see young kids driving by with music blaring so loud, they may as well be deaf."
Yeah, and the car manufacturers are advertising that their cars are *so soundproof* that you can't hear anything outside -- making the inside of your car your own private room (with no outside disturbances).
With me, I turn on the air conditioner blower and put it on high and I can't hear a thing outside (with that fan going). And I hear good (no problems there). Also, at times, I've had people in the car that want the radio on, up a bit loud, too -- and you're right, you can't hear what's going on outside.
In those cases, you're *highly dependent* upon your *eyes* to warn you of what's happening.
Regards,
Star Traveler