Self-driving cars showcased at Detroit Auto Show

Some of them are already being tested, delivering pizzas, groceries, and people to their destinations.

Many car companies around the world are tightening their operations.

They’re doing it for one reason: they know their industry is changing and changing fast.

Technology is redesigning cars at every level, from how they are made, to how they are driven. Driver-less vehicles are at the forefront of those changes.

Al Jazeera’s John Hendren reports from the Detroit Auto Show.