## 5 Research Results and Discussion
### Model Testing  
Model testing is performed to confirm their validity. Model testing was performed on a sample collected at LOC_3 (City Mall--Bijeljina), as a randomly selected shopping centre location. The data collected at this location were not taken into account when forming the model. A comparative view of the actual measured values of the daily number of visitors (UBO) and the number of vehicles arriving in the shopping centre zone (UBV) and the values obtained by models, for the facility at the testing site LOC_3 (City Mall--Bijeljina) is shown in Table 12.  
The results of testing the model at LOC_3 are graphically shown in the appropriate graphs (Figures 3 and 4), which makes it easier to see the error size, i.e., the deviation of linear models from the measured level (represented by a dashed line). \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**MODEL**} & \multicolumn{2}{c}{**Values Obtained by the Model**} & \multicolumn{2}{c}{**Measured Values**} \\ \cline{2-6}  & **Number of Visitors (UBO)** & **Daily Vehicle** & **Number of Visitors (UBO)** & **Daily Vehicle** \\ \hline Model 1 & 1259 & 696 & & \\ Model 2 & 1810 & 988 & & \\ Model 3 & 2691 & 1759 & 3857 & 2473 \\ Model 4 & 3578 & 2316 & & \\ Model 5 & 3746 & 2410 & & \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Comparative representation of measured and values of UBO and UBV obtained by linear models for the test facility LOC_3 (City Mall—Bijeljina). \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Model**} & \multicolumn{2}{c}{**Unstandardized Coefficients**} & \multicolumn{2}{c}{**Standardized Coefficients**} & \multirow{2}{*}{**T**} & \multirow{2}{*}{**Sig.**} \\ \cline{2-2} \cline{4-5}  & **B** & **Std. Error** & **Beta** & & \\ \hline \multirow{3}{*}{4} & Constant. & 960.083 & 466.718 & & 2.057 & 0.109 \\  & BD & 0.020 & 0.016 & 0.425 & 1.257 & 0.277 \\  & UPP & 0.059 & 0.037 & 0.540 & 1.597 & 0.185 \\ \hline \multirow{3}{*}{5} & Constant. & 1308,828 & 396.487 & & 3.301 & 0.021 \\  & UPP & 0.097 & 0.023 & 0.883 & 4.213 & 0.008 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: _Cont._  
\begin{table}
\begin{tabular}{c c} \hline \hline
**MODEL** & **Mathematical Equation of the Model** \\ \hline Model 1 & \(U  
By means of statistical analysis and assessment of the performance of the model at the LOC_3 (City Mall--Bijeljina) test site, it has been concluded that Model 5 gives the values of STABS of 3746 people and UBV 2410 vehicles, which represents the values closest to the measured ones. In this case, the all-day deviation from the measured value for UBO is 111 persons, and for UBV 63 vehicles. Taking into account the values for hourly flow distribution during the day, the differences in the sizes of the determined and calculated relevant values of the UBO and UBV at the observed position in the peak hour amount to 10 persons and 6 vehicles, which can be accepted as a relative error given the character of the traffic flow. That is, the presented Model 5 largely describes the actual measured values (Table 13). Figure 4: Deviations of the UBV values obtained by the models from the measured value at the testing site LOC_3 (City Mall—Bijeljina). Figure 3: Deviations of UBO values obtained by models from the measured value at the testing site LOC_3 (City Mall—Bijeljina). Based on all the results shown above, it has been concluded that the best results at the test location for both variables are shown by Model 5, which has the following forms of finite equations:  
* Model for predicting the total daily number of people on arrival--both drivers and passengers, who use vehicles to visit the mall (UBO): \[UBO=1963.657+0.157\cdot UPP\]
* Model for predicting the total daily number of vehicles in the shopping centre zone accessing the parking facility (UBV): \[UBV=1308.828+0.097\cdot UPP\]  
where: \(UPP\)--Total sales area. Restrictions for the listed models:  
* Models can be applied in.