Method for at least one of communication and interaction between a vehicle driver and a plurality of integrated and/or non-integrated applications by means of a first routine executed by an interaction manager and by each application before communicating and/or interacting with the driver, wherein before the first routine is executed, the interaction manager assigns to each application which is connected to the interaction manager a unique identification number, and wherein the first routine comprises the following steps: - sending a request by the application to the interaction manager for permission to communicate and/or to interact with the driver, wherein the request comprises the assigned identification number of the requesting application, and an identifier and a priority index of the requested communication and/or interaction; - determining by the interaction manager whether a permission for the requested communication and/or interaction can be given, in dependence of the priority index, a current and/or predicted driver/vehicle environment state and/or of other requests which have been received before from this and/or other applications; and - generating and transmitting a response by the interaction manager to the application, comprising the identification number of the requesting application, the identifier of the requested communication and/or interaction, and an indication about permitting or not permitting the requested communication and/or interaction; - wherein the requested communication and/or interaction itself is not changed or altered by the interaction manager, only allowed or not allowed, but is conducted solely by the application if the indication permits the same and wherein otherwise such a permission is awaited by the application, and - wherein the application is a text-to-speech- and/or a text-to-display converter, wherein the communication and/or interaction is provided for outputting to the driver a speech message and/or a message on a display, wherein the text is output as speech and/or displayed on the display, respectively, in the form of chunked segments and wherein each segment is considered as one communication and/or interaction. - sending a request by the application to the interaction manager for permission to communicate and/or to interact with the driver, wherein the request comprises the assigned identification number of the requesting application, and an identifier and a priority index of the requested communication and/or interaction; - determining by the interaction manager whether a permission for the requested communication and/or interaction can be given, in dependence of the priority index, a current and/or predicted driver/vehicle environment state and/or of other requests which have been received before from this and/or other applications; and - generating and transmitting a response by the interaction manager to the application, comprising the identification number of the requesting application, the identifier of the requested communication and/or interaction, and an indication about permitting or not permitting the requested communication and/or interaction; - wherein the requested communication and/or interaction itself is not changed or altered by the interaction manager, only allowed or not allowed, but is conducted solely by the application if the indication permits the same and wherein otherwise such a permission is awaited by the application, and - wherein the application is a text-to-speech- and/or a text-to-display converter, wherein the communication and/or interaction is provided for outputting to the driver a speech message and/or a message on a display, wherein the text is output as speech and/or displayed on the display, respectively, in the form of chunked segments and wherein each segment is considered as one communication and/or interaction.