Xiaopeng Li, a professor of civil and environmental engineering at UW–Madison explains what's involved in getting a car to drive without a human behind the wheel. Li's Connected Autonomous Transportation Systems (CATS) Lab works on its own self-driving vehicle.

Note: When this segment was filmed, Dr. Li's lab was not authorized to drive on campus without a human at the wheel to act as a failsafe. The car shown is driving autonomously, but a human is in the driver's seat as a safety precaution.