There are actually quite a few driverless trains already[1] and Google's demonstrations of their driverless car are getting increasingly[2] impressive[3].
The question is really only when the transition to driverless cars will happen - we're long past the if.
The question is really only when the transition to driverless cars will happen - we're long past the if.
[1] http://en.wikipedia.org/wiki/List_of_driverless_trains
[2] http://www.youtube.com/watch?v=TRIOE1IZrq4
[3] http://www.youtube.com/watch?v=cdgQpa1pUUE