Third reducing emissions and easing congestion. Driverless vehicles will offer the promise of better use of road space, reducing congestion and providing more consistent journey times, through the use of “connected vehicle” technologies. “Connected vehicles” would communicate with each other and their surroundings to identify the optimum route, helping to spread demand for scarce road space. Vehicles could also communicate with roadside infrastructure such as traffic lights and use this information to minimize fuel consumption and emissions.