Driverless cars have been a popular and fertile topic for research and discussion for years. From the first high-profile Grand Challenge to the more recent work by Google, there has always been activity, though it’s rarely applicable to everyday life. But a few years from now we’ll really need to start pondering the potential effects of these robocars on cities, infrastructure, and markets. Koushik Dutta has written an interesting little post on Google+ about one potential major change that could come with the automation of vehicles. If a car can drive itself, that drastically increases its potential efficiency, and decreases the number of cars necessary per capita, especially in a city. You better believe the car companies don’t like the sound of that.