Abstract: A device and method predict a behavior of a road user. The device is configured to provide at least one hypothesis for the behavior of the road user, to provide, for each hypothesis, a hidden Markov model, the hidden Markov model including, for the particular hypothesis, two hidden states, with one of these hidden states representing the road user following the hypothesis and the other of these states representing the road user not following the hypothesis, and possible observations of the hidden Markov model characterizing, for the particular hypothesis, at least one feature of the road user, and to predict the behavior of the road user depending on the hidden states of the hidden Markov model for the at least one hypothesis.