A method is described for checking the plausibility of a recognition of a traffic sign for an autonomously driving vehicle. The method includes a step of reading in, in which an information signal and a position signal are read in via an interface to a vehicle device of the vehicle, the information signal representing a piece of information concerning a traffic sign in road traffic that is recognized using an optical sensor of the vehicle, and the position signal representing an instantaneous position of the vehicle. In addition, the method includes a step of comparing, in which the recognized traffic sign is compared to a sign that is noted on a stored map at the instantaneous position of the vehicle, using the information signal and the position signal. Lastly, the method includes a step of providing a confirmation signal at an interface to the vehicle device when the step of comparing results in a match of the recognized traffic sign with the sign that is noted at the relevant position of the vehicle.