Method for estimating the height of a reflector of a vehicle, wherein the method comprises the following steps: reading in at least one reflection signal from the reflector of the vehicle at a point in time, wherein a signal-emitting transmitting device previously sends a transmission signal, the reflection of which forms the at least one reflection signal, wherein the at least one reflection signal represents at least one piece of information relating to a relative speed (v r) of the vehicle and wherein a further reflection signal from a further reflector of the vehicle is read in, wherein the at least one further reflection signal represents a piece of information relating to a relative speed (v r) of the vehicle; specifying a speed estimation value of the vehicle; and determining a height estimation value of the reflector using the relative speed (v r) of the vehicle and the speed estimation value of the vehicle and using the relative distance of the vehicle from the signal-emitting transmitting device and wherein a further height estimation value of the further reflector is determined from the further reflection signal using the information relating to the relative speed (v r) of the vehicle and with a checking step, wherein, in the checking step, it is checked whether the height estimation value or the further height estimation value is within a tolerance range, wherein the specifying step and determining step are carried out repeatedly if the height estimation value and/or the further height estimation value are outside the tolerance range, wherein, in the repeated specifying step, a re-estimated speed estimation value is specified for the speed of the vehicle, and so the speed of the vehicle can be found. reading in at least one reflection signal from the reflector of the vehicle at a point in time, wherein a signal-emitting transmitting device previously sends a transmission signal, the reflection of which forms the at least one reflection signal, wherein the at least one reflection signal represents at least one piece of information relating to a relative speed (v r) of the vehicle and wherein a further reflection signal from a further reflector of the vehicle is read in, wherein the at least one further reflection signal represents a piece of information relating to a relative speed (v r) of the vehicle; specifying a speed estimation value of the vehicle; and determining a height estimation value of the reflector using the relative speed (v r) of the vehicle and the speed estimation value of the vehicle and using the relative distance of the vehicle from the signal-emitting transmitting device and wherein a further height estimation value of the further reflector is determined from the further reflection signal using the information relating to the relative speed (v r) of the vehicle and with a checking step, wherein, in the checking step, it is checked whether the height estimation value or the further height estimation value is within a tolerance range, wherein the specifying step and determining step are carried out repeatedly if the height estimation value and/or the further height estimation value are outside the tolerance range, wherein, in the repeated specifying step, a re-estimated speed estimation value is specified for the speed of the vehicle, and so the speed of the vehicle can be found.