Today there is a major traffic problem on many roads and highways around the world. Road capacity in many countries cannot cope with the number of vehicles and many other factors such as accidents, obstacles on the road and road construction causing a chain reaction of traffic slowing down. Future Intelligent Transport Systems (ITS) will allow road users and traffic managers to share information and use it to coordinate their actions. V2X communication is an important integral part of the ITS future architecture which enables this improved mobility in a practical and cost-effective way.
One key use-case for mobility is Cooperative Adaptive Cruise Control (CACC). Adaptive cruise control uses speed of other vehicles to adjust speed, acceleration/deceleration and relative position accordingly. CACC can be used by manned vehicles with ACC or by autonomous vehicles.
Another way to improve mobility is with platooning, in which two or more trucks travel together in a convoy while using V2X technology to stay connected and automated driving support systems. Platooning not only improves mobility, but also reduces congestion and saves fuel consumption even when its penetration is low.
Communication between vehicles and infrastructure also enhances mobility. By communicating with traffic signs and traffic lights, a vehicle can optimize its speed and help prevent traffic jams by hitting green waves. Infrastructure can also be adjusted easily to cater for traffic conditions by providing longer green light cycles, etc. Improving the capacity of intersections by V2X communication is crucial for efficient traffic flow in future smart cities.