The invention relates to a method for detecting road users along at least one traffic route, wherein the method comprises the following steps: emitting transmission signals by means of at least one transmission device for radar radiation, detecting received signals by means of at least one reception device for radar radiation, mixing the transmission signals and the received signals to produce baseband signals and calculating a detection matrix from the baseband signals and evaluating the detection matrix in an evaluation module of an electronic data processing device, wherein peaks of the detection matrix are assigned to objects, checking whether a disturbance criterion is met in a diagnostic module, generating signals from the results of the evaluation in the evaluation module and the check in the diagnostic module, and transmitting the signals to a control module of an electronic data processing device.