Silicon Valley debate on self-driving cars: do you need a map?

The company at the forefront of the race, Google Inc, is creating intricate maps that detail every tree and curb along the road - an expensive endeavour that other companies could find difficult to match. Newer entrants such as ride-share service Uber and Apple Inc could take a shortcut and develop a car capable of piloting itself without such elaborate and expensive blueprints, industry experts say. Raj Rajkumar, one of the leading experts on self-driving cars at Carnegie Mellon University, sai