NOISE MAPS OF D1 MOTORWAY

Abstract

This paper is dealing with the issue of D1 motorway surface(s) modernisation from the noise point of view. The surfaces of the individual sections were consecutively and longterm measured by the CPX method. The four analytical maps of the D1 road surface noise 1) before modernisation (year 2013); 2) after the modernisation (one year after the road section was put into operation); 3) difference map of noise before and after the modernisation; and 4) noise map in 2022 are the results. The analyses and measurement results show that the original assumption of the Road and Motorway Directorate – 2 dB reduction in average noise level after modernisation – has been significantly exceeded. It has also been demonstrated that D1, after
the modernisation, had a lower average noise level than the reference (comparative) value specified in TKP 7. Reference value is based on long-term measurements of similar surfaces throughout the Czech Republic.