## 3 Results and Discussion
### Results Measured during Repeated Measurement of Braking Characteristics of a Vehicle  
The results of braking characteristics, stopping distance, braking time and MFDD are shown in Tables  
The differences in braking characteristics are low when using various brake components. The differences between the values measured in the first measurement (Table 8) and the values measured in the repeated measurement (Table 12) are also not strong. The brake components' properties did not change significantly even when heated to high temperatures and then cooled again.  
The biggest differences were caused by different vehicle speed before braking (Table 12, line 2). The differences could have also been affected by human factors, change in air humidity between particular measurements and other factors that cannot be eliminated completely. The MFDD of the low-priced and mid-priced brake components was the same, and the MFDD of high-priced brake components was slightly lower. Again, a very low impact of the brake components' price on braking characteristics of a vehicle under common conditions can be concluded.  
Most likely, the fact that the vehicle used for measurements was equipped with the brake assistance system, known as BAS or EBA, contributed to the reduction in differences in braking characteristics between particular brake components [114; 115]. Brake assistance system, BAS, or emergency brake assistant, EBA, recognise emergency braking according to how fast the acceleration pedal or brake pedal are applied and activate the maximum braking effect irrespective of the force applied by the driver on the brake [116; 117; 118]. The anti-block system (ABS) could also have reduced the differences [119; 120]. The ABS system avoids the wheel blocking to ensure the highest vehicle steering wheel control possible [121; 122]. While braking on a dry asphalt surface under all wheels, it probably led to limitation of the braking force, proven by the ABS's warning light and vibration of brake pedal, which is typical for the ABS system's activity [123]. Thus, activation of braking force is affected by the BAS system, and the regulation of the braking force is affected by the  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Number** & **Initial Speed (km.h\({}^{-1}\))** & **Stopping Distance (m)** & **Braking Time (s)** & **MFDD (m.s\({}^{-2}\))** \\ \hline
1 & 49.86 & 10.61 & 1.62 & 9.41 \\ \hline
2 & 48.67 & 10.59 & 1.53 & 9.25 \\ \hline
3 & 49.12 & 10.48 & 1.54 & 9.89 \\ \hline
4 & 50.52 & 11.42 & 1.58 & 9.24 \\ \hline
5 & 50.38 & 11.35 & 1.51 & 9.32 \\ \hline
6 & 50.11 & 10.92 & 1.54 & 9.37 \\ \hline
7 & 51.45 & 11.3 & 1.56 & 09.4 \\ \hline
8 & 50.47 & 11.72 & 1.55 & 09.9 \\ \hline Average & 50.47 & 11.05 & 1.55 & 9.37 \\ \hline Standard deviation & 0.59 & 0.31 & 0.02 & 0.16 \\ \hline \hline \end{tabular}
\end{table}
Table 11: Braking characteristics measured with high-priced brake components.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Brake Disc** & **Low-Priced** & **Mid-Priced** & **High-Priced** & **Standard Deviation** \\ \hline Initial speed (km.h\({}^{-1}\)) & 48.25 \(-\) 4.21 & 49.18 \(+\) 0.10 & 50.07 \(+\) 0.66 & 0.33 \\ \hline Stopping distance (m) & 10.21 \(-\) 10.75 & 10.28 \(-\) 4.81 & 11.05 \(+\) 1.1 & 0.17 \\ \hline Braking time (s) & 1.49 \(-\) 6.29 & 1.50 \(-\) 2.59 & 1.55 \(+\) 0.65 & 0.01 \\ \hline MFDD (m.s\({}^{-2}\)) & 9.46 \(+\) 0.85 & 9.49 \(+\) 2.48 & 9.37 \(-\) 0.11 & 0.02 \\ \hline \hline \end{tabular}
\end{table}
Table 12: Vehicle’s braking characteristics during the repeated measurement.  
ABS system. Interference of the abovementioned system likely reduced the differences in braking characteristics when using different brake components.