The difference between (driverless) cars and trams/buses is that the latter require a _lot_ less road space per passenger. Take a look at the picture here[1].

The difference between (driverless) cars and trams/buses is that the latter require a _lot_ less road space per passenger. Take a look at the picture here[1]. [1] http://farm9.staticflickr.com/8456/7999510360_8e46299621_b.jpg http://farm9.staticflickr.com/8456/7999510360_8e46299621_b.j...