Train traffic control system comprising a route and train control system (RTCS), an operator workstation with a display, wherein the operator workstation comprises at least one basic integrity indication component with safety level SILO for indicating information with a basic integrity on the display, wherein the operator workstation is adapted to generate graphical data of information with basic integrity, and wherein the operator workstation comprises only components with safety level SILO or less, and a safe state indication component with safety level SIL>0, in particular SIL4, configured to transform state data concerning the state of elements of the route and train control system (RTCS) into graphical data and thereby generating indication data indicating safety-related information concerning the state of elements of the route and train control system (RTCS) on the display of the operator workstation, wherein the basic integrity indication component and the safe state indication component are software components, wherein the safe state indication component is functionally independent of the operator workstation, and the safe state indication component is functionally separated from the basic integrity indication component, wherein the function for generating indication data of safety-related information concerning the state of elements of the route train control system is outsourced from the operator workstation, and a safe channel connecting the safe state indication component and the display for safe transmission of safety-related information about the state of elements of the route train control system (RTCS). a route and train control system (RTCS), an operator workstation with a display, wherein the operator workstation comprises at least one basic integrity indication component with safety level SILO for indicating information with a basic integrity on the display, wherein the operator workstation is adapted to generate graphical data of information with basic integrity, and wherein the operator workstation comprises only components with safety level SILO or less, and a safe state indication component with safety level SIL>0, in particular SIL4, configured to transform state data concerning the state of elements of the route and train control system (RTCS) into graphical data and thereby generating indication data indicating safety-related information concerning the state of elements of the route and train control system (RTCS) on the display of the operator workstation, wherein the basic integrity indication component and the safe state indication component are software components, wherein the safe state indication component is functionally independent of the operator workstation, and the safe state indication component is functionally separated from the basic integrity indication component, wherein the function for generating indication data of safety-related information concerning the state of elements of the route train control system is outsourced from the operator workstation, and a safe channel connecting the safe state indication component and the display for safe transmission of safety-related information about the state of elements of the route train control system (RTCS).