A method of operation of a laser transponder system for disrupting the operation of a distance and/or speed measuring LIDAR based on time-of-flight measurement, said laser transponder system consisting of at least one laser receiving unit and at least one laser transmitting unit geometrically separated on a vehicle chassis and pointed in the direction of the LIDAR which normal operation should be disrupted, where cross-talk between said laser receiving unit and said laser transmitting unit is eliminated by using the laser receiving unit with low sensitivity which prevents said laser receiving unit to detect echo emissions from the laser transmitting unit; a receiver that is converting optical signals received from said laser receiving unit to electrical impulses which are sent to a microcontroller, where said microcontroller has pre-stored values in a database regarding the LIDARs and an algorithm with the decision logic for the disruption operation based on a disruption timer D, and a user interface; wherein said method comprises the following steps: A. said microcontroller unit analyses received LIDAR's signal from laser receiving unit, which consists of a series of pulses, by extracting period times T i between observed pulses and comparing the said period times T i with the already pre-stored values in the database, and - if the corresponding period times T i are identified within the database, the user is alerted and the system executes one of the LIDAR's counter measure of steps B or C depending on the nature of received period times T i; or - if the corresponding period times Ti are not identified the system waits for the next signal or triggering event; B. in case all period times T i between the received pulses are equal within a predetermined tolerance, procedure for standard speed measuring LIDAR disruption is executed by setting the disruption timer D to a single value equal to the pulse repetition period of the LIDAR corrected for the phase shift in the way that value D is decremented to set the phase of the disrupting signal; and when disruption timer D times out it initiates disruption transmission on said laser transmitting unit; or C. in case period times T i between the received pulses are not equal within the predetermined tolerance, said method is characterised by that a procedure for advanced speed measuring LIDAR disruption is executed by setting the disruption timer D to the multiple values corresponding to all possible advanced LIDAR periods; where each value D is corrected for the phase shift in the way that value D is decremented to set the phase of the disrupting signal; and on each of the multiple values D when disruption timer D times out it initiates disruption transmission on said laser transmitting unit, where on each signal received by the laser receiving unit in step B. or C. the disruption timer D is reset; and where the process is finished in absence of LIDAR signal within a predetermined time window. A. said microcontroller unit analyses received LIDAR's signal from laser receiving unit, which consists of a series of pulses, by extracting period times T i between observed pulses and comparing the said period times T i with the already pre-stored values in the database, and - if the corresponding period times T i are identified within the database, the user is alerted and the system executes one of the LIDAR's counter measure of steps B or C depending on the nature of received period times T i; or - if the corresponding period times Ti are not identified the system waits for the next signal or triggering event; - if the corresponding period times T i are identified within the database, the user is alerted and the system executes one of the LIDAR's counter measure of steps B or C depending on the nature of received period times T i; or - if the corresponding period times Ti are not identified the system waits for the next signal or triggering event; B. in case all period times T i between the received pulses are equal within a predetermined tolerance, procedure for standard speed measuring LIDAR disruption is executed by setting the disruption timer D to a single value equal to the pulse repetition period of the LIDAR corrected for the phase shift in the way that value D is decremented to set the phase of the disrupting signal; and when disruption timer D times out it initiates disruption transmission on said laser transmitting unit; or C. in case period times T i between the received pulses are not equal within the predetermined tolerance, said method is characterised by that a procedure for advanced speed measuring LIDAR disruption is executed by setting the disruption timer D to the multiple values corresponding to all possible advanced LIDAR periods; where each value D is corrected for the phase shift in the way that value D is decremented to set the phase of the disrupting signal; and on each of the multiple values D when disruption timer D times out it initiates disruption transmission on said laser transmitting unit, where on each signal received by the laser receiving unit in step B. or C. the disruption timer D is reset; and where the process is finished in absence of LIDAR signal within a predetermined time window.