Before revision: The VICS information can be displayed on the car navigation unit at 3 levels: Level-1: Simple text data Level-2: In form of simple diagrams Level-3: Data superimposed on the map displayed on navigation unit (e.g., traffic congestion data) Information transmitted includes traffic congestion data, data on availability of service areas (SA) and parking areas (PA), information on road works and road accidents .
After revision: The VICS information can be displayed on the car navigation unit at 3 levels: Level-1: Simple text data Level-2: In form of simple diagrams Level-3: Data superimposed on the map displayed on navigation unit (e.g., traffic congestion data) Information transmitted includes traffic congestion data, data on availability of service areas (SA) and parking areas (PA), information on road works and traffic collisions .