A device for warning of radar traps, comprising a radar detection antenna, a central processing unit, which is connected to the radar detection antenna, an alert device, which is connected to the central processing unit and which is designed for delivering an alarm, wherein the central processing unit is designed for determining at least one characteristic of the signal received by the radar detection antenna and for causing the alert device to deliver an alarm or suppress the delivery of an alarm in dependence on said at least one determined characteristic, wherein said at least one characteristic comprises: the structure of the amplitude of the signal received by the radar detection antenna over a predetermined distance covered by the vehicle; the modulation frequency of an amplitude modulation on the signal received by the radar detection antenna; the modulation depth of an amplitude modulation on the signal received by the radar detection antenna; the modulation frequency of a frequency modulation on the signal received by the radar detection antenna; the frequency sweep of a frequency modulation on the signal received by the radar detection antenna; the phase of a phase modulation on the signal received by the radar detection antenna; the modulation frequency of a phase modulation on the signal received by the radar detection antenna; the duty cycle of a pulse modulation on the signal received by the radar detection antenna; the modulation frequency of a pulse modulation on the signal received by the radar detection antenna; the frequency stability of the signal received by the radar detection antenna; or the phase noise of the signal received by the radar detection antenna; characterized in that the device further comprises a database; and a self-learning function, wherein the values of the determined characteristics of each detected signal are stored in the database, and wherein it is determined on the basis of an analysis of the stored characteristics to what extent signals correspond to known signals, and in the case that signals correspond to known signals, said signals are allocated the same status as the known signal so as to cause an alarm to be delivered or suppressed upon detection of said signal. the structure of the amplitude of the signal received by the radar detection antenna over a predetermined distance covered by the vehicle; the modulation frequency of an amplitude modulation on the signal received by the radar detection antenna; the modulation depth of an amplitude modulation on the signal received by the radar detection antenna; the modulation frequency of a frequency modulation on the signal received by the radar detection antenna; the frequency sweep of a frequency modulation on the signal received by the radar detection antenna; the phase of a phase modulation on the signal received by the radar detection antenna; the modulation frequency of a phase modulation on the signal received by the radar detection antenna; the duty cycle of a pulse modulation on the signal received by the radar detection antenna; the modulation frequency of a pulse modulation on the signal received by the radar detection antenna; the frequency stability of the signal received by the radar detection antenna; or the phase noise of the signal received by the radar detection antenna; characterized in that the device further comprises a database; and a self-learning function, wherein the values of the determined characteristics of each detected signal are stored in the database, and wherein it is determined on the basis of an analysis of the stored characteristics to what extent signals correspond to known signals, and in the case that signals correspond to known signals, said signals are allocated the same status as the known signal so as to cause an alarm to be delivered or suppressed upon detection of said signal.