Indirect monitoring of railway bridge modal parameters, i. e. natural frequencies, damping ratios, and mode shapes, by application of the drive-by monitoring method has attracted the interest of several researchers due to the advantages it offers over direct monitoring methods. This technique is based on the analysis of the bridge´s dynamic responses during the train crossing event recorded by sensors installed just on the vehicle and extracting the bridge´s modal parameters from the recorded data. It is accounted that both the vehicle and the railway bridge exhibit coupled vibration responses as long as their contact is maintained through the vehicle wheels. Hence, the vehicle acts as both, a vibration exciter, and a vibration receiver of the bridge´s vibrations during the train crossing event. In the last decade numerous research groups have applied various data-driven methods for identification of modal parameters of railway bridges. However, in most cases the researchers carried out just theoretical studies, i. e. train crossing simulations by multi-body models for the vehicle and continuous Euler-Bernoulli Beam for the bridge, and did not consider real vehicles and railway bridges, respectively. Hence, the aim of this contribution is to apply different state-of-the-art and new sophisticated data-driven methods for the potential identification of the railway bridge modal parameters to the recorded data of a real instrumented vehicle and to identify the modal parameters of an existing railway bridge erected on an Austrian high-speed track. In the conducted research project, the considered vehicle was instrumented with 27 accelerometers at different locations at the wheelsets, bogies, and car bodies. Train test runs were carried out with different train speeds and the bridge crossing events were recorded at every train speed. The railway bridge selected for application of the drive-by monitoring method is a single-track steel deck bridge with a ballast superstructure and a span length of 33.3 m. To get a solid basis for the reliable identification of the bridge´s modal parameters by analysing the vehicle vibrations during the train crossing event only, the modal parameters of the bridge were also measured by forced vibration tests. The contribution compares the results gained by application of different data-driven methods regarding the reliable identification of modal parameters of railway bridges by use of the drive-by monitoring method.