This paper concerns the problem of ground vibrations induced by road traffic and its influence on nearby historical monuments. The influence of vibrations induced by road traffic on buildings of St. Catherine’s church was studied, this church lying in Warsaw, near a heavily used street. The measurements of vibrations of soil and walls of the church were executed using standard, 10 Hz, seismic, three-component geophone stations. Measuring points were established along chosen profiles between the street and the church. Interpretation of the obtained vibration records permitted to trace road-traffic-induced vibrations to the church wall with a velocity in the range characteristic of surface seismic waves and to quantify the range of the frequency and acceleration of the vibrations of soils and walls of the church. These results were compared to the Polish construction norm PN-85/B -02170 (title: “Evaluation of the harmfulness of building vibrations due to ground motion”). In effect, the recorded and traced vibrations exceeded the norms tolerable for such constructions.

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