# Efficiency Analysis of Roadway Lighting Replacement in a Selected Polish Municipality
## 3 Results
### Costs of Dismantling and Installing the Lighting Network for the Selected Options  
One of the main objectives of this study was to analyse the feasibility and cost-efficiency of retrofitting the street lighting network. The following section presents a few selected \begin{table}
\begin{tabular}{c c c} \hline \hline
**Year** & **Number of Replaced Luminaires (Units)** & **Age of Luminaires (Years)** \\ \hline
2009 & 511 & 13 \\
2010 & 36 & 12 \\
2011 & 36 & 11 \\
2012 & 36 & 10 \\
2013 & 36 & 9 \\ Total & 655 & - \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Summary data on the age of luminaires. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Year** & **Operating Costs** & \begin{tabular}{c} **Scheduled** \\ **Maintenance Costs** \\ \end{tabular} & \
\begin{tabular}{c} **Additional** \\ **Maintenance Costs** \\ \end{tabular} &
\begin{tabular}{c} **Total Costs** \\ \end{tabular} \\ \hline
2019 & EUR 46,709 & EUR 6582 & EUR 4246 & EUR 57,537 \\
2020 & EUR 48,832 & EUR 7006 & EUR 2972 & EUR 58,811 \\
2021 & EUR 50,955 & EUR 7219 & EUR 4671 & EUR 62,845 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Operation and maintenance costs of the street lighting network in a selected municipality. pole and luminaire systems that are being considered as proposals for the extension and upgrade of the network. The authors considered factors such as price, quality, ease of implementation of the solution and the shortest possible execution time when selecting them while maintaining the parameters of the existing network, as well as the intensity and colour of the light. Table 3 presents the pole variants adopted for the analysis as combinations of spun or reinforced concrete poles with selected types of structures and luminaires. The installation of light poles requires a suitable structure for them, i.e., a geotechnical structure to hold them in place and correct position. Table 4 summarises the pole installation costs for the seven selected options. The costs in Table 4 include direct costs (labour, materials, equipment) and indirect costs. Table 5 summarises the installation costs for the luminaires without and with twilight dimming selected for analysis. The number of luminaire points was kept unchanged at 655. Table 6, in turn, shows the costs associated with the dismantling of a single pole. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Name of the Variant** & **Number of New** & **Installation** & **Installation Price** & **Installation Time** & **Installation Time** \\  & **Poles (Units)** & **Price per Pole** & **of All Poles** & **per Pole (h)** & **for All Poles (h)** \\ \hline EOP poles in Uo system & & EUR 1317 & EUR 483,489 & 1.7 & 624 \\ EOP poles in Uos system & & EUR 1325 & EUR 486,502 & 1.6 & 587 \\ EOP poles in Up system & & EUR 1345 & EUR 493,759 & 1.8 & 661 \\ ZN poles in UO1/ZN & & EUR 1159 & EUR 425,643 & 1.5 & 551 \\ ZN poles in UB1/ZN & & EUR 1163 & EUR 426,999 & 1.4 & 514 \\ ZN poles in UP1/ZN & & EUR 1134 & EUR 416,531 & 1.6 & 587 \\ ZN poles in UP2/ZN & & EUR 1140 & EUR 418,731 & 1.6 & 587 \\ system & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Pole installation costs for the 7 selected options. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Variant** & **Types of Poles** & **Type of System** \\ \hline V1 & E-type spun concrete poles, e.g., EOP 9/2.5 & Uo \\ V2 & E-type spun concrete poles, e.g., EOP 9/2.5 & Uos \\ V3 & E-type spun concrete poles, e.g., EOP 9/2.5 & Up \\ V4 & ZN-type reinforced concrete poles, e.g., ZN 9/200 & UO1/ZN \\ V5 & ZN-type reinforced concrete poles, e.g., ZN 9/201 & UB1/ZN \\ V6 & ZN-type reinforced concrete poles, e.g., ZN 9/202 & UP1/ZN \\ V7 & ZN-type reinforced concrete poles, e.g., ZN 9/203 & UP2/ZN \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Pole variants selected for analysis.