As a rule, self-driving car tests tend to be limited to the country where they started. But that's not how people drive -- what happens when your autonomous vehicle crosses the border? Continental and Magna plan to find out. They're planning to pilot two driverless vehicles all the way from southeastern Michigan to Sarnia, Ontario, making this the first cross-border test of its kind. The machines won't be in complete control for the entire route, but they'll use a combination of cameras, lidar and radar to take over when they can, including two key border crossings (the Detroit-Windsor Tunnel and the Blue Water Bridge).