The increase in urban traffic and the subsequent introduction of more traffic lights, wider roads and more lanes has the potential to result in a great level of congestion and traffic incidents. In these situations it is vitally important that some vehicles can be prioritised and move through the traffic as quickly as possible. The Intersection Management System allows for the intersection controller to be alerted e.g.: the approach of an emergency vehicle, and he is then able to control the traffic lights at the intersection so that the vehicle passes through quickly and safety. Similarly buses travelling in bus lanes can be prioritised so they run on schedule even in high congestion scenarios.