Research Article

Simultaneous Measurements of the Vehicle, Track, and Soil Vibrations at a Surface, Bridge, and Tunnel Railway Line

Figure 6

Transfer function of the soil and one-third of octave band spectra of the mobility at the distances □ 2.5, ○ 7.5, △ 12.5, + 22.5, × 37.5, and ◊ 62.5 m.