Abstract: This traffic system improves transportation for land or sea traffic grids by providing current traffic flow information to each vehicle operator. It consists of vehicle-carried units that triangulate their position from GPS signals, determine direction and speed of the vehicle, and send these and optional information to a central server. Each unit receives traffic flow and other optional information when requested and if available. The information is reported as an overlay to electronic maps, and serves as a basis of optimized route planning. The raw data is compliant with GPS grids and can be used in multiple transportation systems. The server can act as traffic control manager and archive for multiple traffic systems since it receives position, direction and speed from numerous similarly equipped vehicles and continually updates traffic information to requesting units through a wireless signal. The system enables tracking of individual vehicles.