As millions of Americans hit the roads today for Thanksgiving travel, I wonder how different it would be if self-driving cars were the norm.

CNBC explores the current state of self-driving cars.

More companies are trying to bring self-driving cars to the masses than ever before, but a truly autonomous vehicle still doesn’t exist. It’s not clear if, or when, our driverless future will arrive. Where exactly are we with self-driving cars, and when can we expect them to be a part of our daily lives?