Using a system called the Generic Obstacle and Lane Detector, or GOLD, these two vans were able to pretty much guide themselves across the two continents. Lasers scanners and video cameras worked together to ensure the vans didn’t cause any accidents (and it is pretty remarkable they made it that far unscathed.) The researchers had to intervene in heavy traffic or at toll booths, but for the most part they did the driving themselves.
Added bonus. The vans are electric.