We present the results of an experiment conducted in the suburbs of Paris designed to measure the attenuation of waves generated by the passage of the RER A regional train along a seismic profile perpendicular to the rails, as well as along a 300-m-long fiber optic cable meandering through the field adjacent to the tracks. The subsurface structure of the study site was characterized using ambient noise array techniques, revealing a soil layer 33 m thick with an S-wave propagation speed close to 300 m/s. Following the methodology described by Kim and Lee (2000), we estimated an average attenuation coefficient of 1.54 × 10–3 along the seismic profile for frequencies ranging between 2 Hz and 55 Hz. Moreover, analysis of the node recordings provided a clearer understanding of the wave types propagating the seismic line. The results indicate that in the far field, Rayleigh waves dominate the recordings, propagating as a planar wavefront that is not parallel to the railway tracks. These results should be improved by the future analysis of the fiber data. A comparison of the nodes data with the DAS ones shows indeed the accuracy of the latter technique.