A position data processing device for carrying in or on a vehicle, wherein the position data processing device in a state of given operational readiness is configured - to receive or generate position data (111-1) which are indicative of the position of the vehicle, - to generate, as a function of the received or generated position data (111-1), at least one trajectory (TJ-1, ..., TJ-n) which is indicative of a route travelled by the vehicle, - to carry out at least one trajectory-specific transaction in relation to the at least one generated trajectory (TJ-1, ..., TJ-n), and - as a result of or as part of carrying out the trajectory-specific transaction, to send, as part of an operational notification , the at least one generated trajectory (TJ-1, ..., TJ-n) or a reference value (RWA-1, ..., RWA-n) determined from the at least one generated trajectory (TJ-1, ...., TJ-n) in accordance with a reference value determination method, to an operational notification evaluation system located outside and remote from the vehicle, characterised in that the position data processing device in the state of given operational readiness is also configured - not to signal lack of operational readiness and/or a given operational readiness, - to reduce a number of admissible trajectory-specific transactions of greater than zero as a result of the at least one carried out trajectory-specific transaction, - to receive a response notification which the operational notification evaluation system has sent as a function of the at least one sent operational notification , - depending on the received response notification , to modify the number of admissible trajectory-specific transactions to a number greater than zero, leave it unchanged or set it to zero and - to switch to a state of lack of operational readiness if the number of admissible trajectory-specific transactions is equal to zero, and in the state of lack of operational readiness, the position data processing device is configured - not to carry any trajectory-specific transaction and - to signal a lack of operational readiness and/or no given operational readiness. - to receive or generate position data (111-1) which are indicative of the position of the vehicle, - to generate, as a function of the received or generated position data (111-1), at least one trajectory (TJ-1, ..., TJ-n) which is indicative of a route travelled by the vehicle, - to carry out at least one trajectory-specific transaction in relation to the at least one generated trajectory (TJ-1, ..., TJ-n), and - as a result of or as part of carrying out the trajectory-specific transaction, to send, as part of an operational notification , the at least one generated trajectory (TJ-1, ..., TJ-n) or a reference value (RWA-1, ..., RWA-n) determined from the at least one generated trajectory (TJ-1, ...., TJ-n) in accordance with a reference value determination method, to an operational notification evaluation system located outside and remote from the vehicle, - not to signal lack of operational readiness and/or a given operational readiness, - to reduce a number of admissible trajectory-specific transactions of greater than zero as a result of the at least one carried out trajectory-specific transaction, - to receive a response notification which the operational notification evaluation system has sent as a function of the at least one sent operational notification , - depending on the received response notification , to modify the number of admissible trajectory-specific transactions to a number greater than zero, leave it unchanged or set it to zero and - to switch to a state of lack of operational readiness if the number of admissible trajectory-specific transactions is equal to zero, - not to carry any trajectory-specific transaction and - to signal a lack of operational readiness and/or no given operational readiness. <EOS>