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% Add the following three lines to the preamble:
% \usepackage{multirow}
% \usepackage{dcolumn}
% \newcolumntype{,}{D{,}{,}{-1}}
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\begin{tabular}{|l||,,|,|}
\hline
& \multicolumn{1}{c}{\multirow{2}{*}{Refrence}} & \multicolumn{1}{c}{\multirow{2}{*}{Agenti}} & \multicolumn{1}{|c|}{/Agenti} \\
& \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{|c|}{/Refrence} \\
\hline
Tok vozidel [voz/h] & 170,00 & 168,00 &  -1,2\,\% \\
Pr�m�rn� doba j�zdy [s] &  14,56 &  15,12 &   3,8\,\% \\
Sm�rodatn� odchylka doby j�zdy [s] &  12,40 &  14,29 &  15,2\,\% \\
Pr�m�rn� zpo�d�n� [s] &  10,34 &  10,90 &   5,4\,\% \\
Sm�rodatn� odchylka zpo�d�n� [s] &  12,40 &  14,29 &  15,2\,\% \\
Pr�m�rn� rychlost [km/h] &  58,94 &  65,49 &  11,1\,\% \\
Sm�rodatn� odchylka rychlosti [km/h] &  22,37 &  24,30 &   8,6\,\% \\
Hustota vozidel [voz/km] &  13,94 &  14,44 &   3,6\,\% \\
Pr�m�rn� doba zastaven� [s] &   7,90 &   8,96 &  13,5\,\% \\
Sm�rodatn� odchylka doby zastaven� [s] &  11,37 &  13,24 &  16,5\,\% \\
Po�et zastaven� [-] &   0,61 &   0,55 & -10,0\,\% \\
\hline
\end{tabular}
% 5.495 - �evnick� (south) - input, left turn