Lastly, that brings us to our leader: Ford.
The Detroit-based automaker aims to roll out a fleet of driverless vehicles in a ride-hailing or -sharing service in 2021. Ford is trippling the size of its autonomous test fleet to 100 cars this year. The cars are currently being tested in Arizona, Michigan, and California.
"What we have said is, we may not be the first, but when we do, it will be true to our brand, which means accessibility," Ford CEO Mark Fields told Business Insider in March 2016. "We want to make sure it's available to everyone, and not just folks who can afford luxury cars."
Ford has been pursuing autonomous vehicles since it entered the DARPA Grand Challenge in 2005.
Ford and Baidu invested $150 million in Velodyne, a lidar manufacturer, in 2016. In February, Ford invested $1 billion (to be spread out over 5 years) in Argo AI, a secretive artificial intelligence startup based in Pittsburgh, to aid its autonomous car efforts.
Navigant Research gave Ford an overall score of 85 out of a possible 100.