Car makers have explored a number of ways to have self-driving vehicles signal where they're going, but they tend to rely on blinking lights or other codes that might not be easy to interpret in a hurry. Jaguar Land Rover might have something more intuitive: it has developed a system that projects an autonomous vehicle's direction of travel on the road ahead. The system casts a series of bars on the road to indicate when it's turning, setting off or stopping. The gap between the bars can expand or shrink to indicate changes in speed. You'll know if it's safe to cross the road without having to carefully watch a car's actions.