I have figured out the root cause of distracted driving, cars today are easy and boring to drive. Drive an older car with a lively engine and a manual transmission and you'll see the difference. It doesn't even have to be that old, one of my last cars before going car free was an 89 Renault Alliance. That car was a hoot, nice gear box and a lively little 4 banger that put out less than 100hp. It was great fun revving the hell out of that car and rowing the gears while zipping in and out of traffic. It had 4 wheel independent suspension and it made me feel like a race car driver at a whopping 35mph. The fact is it's more fun to drive a slow car "fast" than it is to drive a fast car slow. It had power nothing except for the brakes. No power steering even, for entertainment I had an AM/FM radio that would spontaneously change stations. It was great, no distractions kept my eyes on the road and my mind focused on the task at hand.
On the other extreme I've had the pleasure and privilege of owning and building several vintage muscle cars. A couple approached 500 horsepower. When you're driving classic American iron, with classic American suspension and brakes, with more power on tap than some semi's your attention is definitely focused on the task at hand. Especially if you get caught in rain with DOT slicks and drum brakes. State of the art in 1968 is wholly outdated today. Forget about talking on your phone, with both feet working pedals and one hand on the wheel and the other hand on the shifter doing anything but driving is virtually impossible. Even with a Bluetooth the cockpit noise is enough to loosen the fillings in your teeth.
In the middle fall trucks, I've had a few muscle trucks, they're squirrely at best with little to no weight over the drive tires and a ton of power under the hood. It was easy to get careless and get sideways through a corner. Big 4x4's present their own set of challenges as the truck gets higher and the tires get bigger. Towing a heavy load with a 460 and a 5 speed in the 3 dimensional driving this area offers requires constant thought and attention. You'd better be looking a ways down the road to be safe.
So what we need is cars that are not boring to drive, if drivers weren't bored they wouldn't need distractions. We need to get back to simple cars that are fun to drive. Once the driver is actively engaged in the process of driving they'll be less distracted.