# Mapping Noise from Motorised Transport in the Context of Infrastructure Management
## 3 Results and Discussion
### Population Figures Exposed to Noise  
The following subsections summarise statistics regarding the estimated number of dwellings, residents, facilities for the permanent or temporary residence of children and young people, hospitals, and social care homes exposed to road noise expressed by L\({}_{\text{den}}\) and L\({}_{\text{Aeq}}\) indicators. The data concerning the number of residents and dwellings exposed to noise expressed by L\({}_{\text{den}}\) and L\({}_{\text{Aeq}}\) indicators follow the guidelines outlined in Appendix No. 2 of the Regulation of the Minister of Climate and Environment of 1 July 2021. This regulation details the scope of data included in strategic noise maps, as well as their presentation and transmission formats [65]. The figures have been rounded to the nearest 100, i.e., according to the explanations in Annex VI of the Directive 2002/49/EC of the European Parliament and the Council on standard methods of noise assessment, 'the numbers are rounded to the nearest hundred' (i.e., 5200 = between 5150 and 5249; 100 = between 50 and 149; 0 = less than 50). Statistics on the occurrence of acceptable noise levels are shown in Tables 6 and 7. Based on the data obtained, values were calculated for indicators to assess the harmful effects of environmental noise:  
* Significant annoyance (HA, from high annoyance),
* High sleep disturbance (HSD),
* Ischaemic heart disease (IHD). The results of the analyses are presented in Table 8. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Grodzisk County**} & \multicolumn{6}{c}{**L\({}_{\text{den}}\)**} & \multicolumn{6}{c}{**L\({}_{\text{Aeq}}\)**} \\ \cline{2-10}  & **55-59** & **60-64** & **65-69** & **70-74** & **75-79** & **+80** & **50-54** & **55-59** & **60-64** & **65-69** & **70-74** \\  & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** \\ \hline Area (km2) & 0.836 & 0.527 & 0.367 & 0.169 & 0.000 & 0.000 & 0.572 & 0.410 & 0.230 & 0.008 & 0.000 & 0.000 \\ \hline Number of residential units & 372 & 301 & 232 & 0 & 0 & 0 & 252 & 312 & 11 & 0 & 0 & 0 \\ \hline Number of residents & 600 & 500 & 100 & 0 & 0 & 0 & 500 & 200 & 0 & 0 & 0 \\ \hline Facilities for the permanent & & & & & & & & & & & \\ \hline Facilits for the permanent or & & & & & & & & & & & \\ \hline young persons & & & & & & & & & & & \\ \hline Healthcare facilities & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ \hline Social welfare facilities & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Noise-exposure statistics for county roads. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Grodzisk County**} & \multicolumn{6}{c}{**L\({}_{\text{den}}\)**} & \multicolumn{6}{c}{**L\({}_{\text{Aeq}}\)**} \\ \cline{2-10}  & **55-59** & **60-64** & **65-69** & **70-74** & **75-79** & **+80** & **50-54** & **55-59** & **60-64** & **65-69** & **70-74** \\  & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** & **dB** \\ \hline Area (km2) & 0.836 & 0.527 & 0.3  
Figure 4: Emission map showing noise expressed as L\({}_{\rm{Aeq}}\). Figure 3: Noise emission map showing noise expressed by L\({}_{\rm{den}}\). Figure 5: Emission map showing noise expressed as \(\rm L_{\rm{Aeq. }}\)  
Figure 6: Emission map showing noise expressed as \(\rm L_{\rm{Aeq. }}\)  
Figure 8: Map of acoustically protected areas with permissible noise levels expressed in L\({}_{\text{den}}\) and L\({}_{\text{Aeq}}\) indicators. Figure 7: Map of acoustically protected areas with permissible noise levels expressed in L\({}_{\text{den}}\) and L\({}_{\text{Aeq}}\) indicators. Figure 10: Map of noise-prone areas in which the permissible noise levels expressed in L\({}_{\text{den}}\) are exceeded. Figure 9: Map of acoustically protected areas with permissible noise levels expressed in L\({}_{\text{den}}\) and L\({}_{\text{Aeq}}\) indicators. Noise maps are valuable tools for assessing the scale of the noise problem for infrastructure managers [73; 74; 75].