These systems are traditionally run by separate modules, increasing complexity and weight in a car. Brake-by-wire systems also stop sooner—and not just because the computer is faster than you.

One reason that today's vehicles are the safest in history is that, since 1968, all vehicles come equipped with dual brake systems.

The new purely electro-mechanical brake system eliminates the need for brake fluid, using electric motors to generate braking force at the wheels.

More cars are using brake-by-wire systems. There's no need to be afraid.