In this, the fourth of a series, Popular Science profiles one of the favored teams competing to win the Darpa Grand Challenge autonomous-vehicle race, which will take place on Saturday, October 8, near Primm, Nevada. Today we look at Stanford's entry, affectionately dubbed Stanley, which is designed to automatically choose the best route. Stay tuned to popsci.com for more previews throughout the week and for minute-by-minute videos and updates on race day.

In this, the second of a series, Popular Science profiles one of the favored teams competing to win the Darpa Grand Challenge autonomous-vehicle race, which will take place on Saturday, October 8, near Primm, Nevada. Today we look at Team DAD's Toyota truck, equipped with an innovative laser-based navigation system. Stay tuned to popsci.com for more previews throughout the week and for minute-by-minute videos and updates on race day.

Team DAD (Digital Auto Drive)