## 3 Magnetic and RF-EMF Measurement Results
### Measurement Results for E4 Route  
For the E4 route, Figure 15 illustrates the variation in magnetic and RF-EMF values during the morning journey in the driver's area. An analysis of the magnetic field measurements indicates a decrease in both the measured B values and peak values compared to the E1 route. The highest recorded B value was 2.7150 \(\upmu\)T, with an average value of 0.4086 \(\upmu\)T. Upon analyzing the RF-EMF values measured during this campaign, it is observed that while the values averaged below 1 V/m, they reached 6.01 V/m in one particular region. The B and RF-EMF values measured in the driver's area on the E4 route were mapped to enhance visualization, as depicted in Figure 16.  
The band-selective RF-EMF measurements in the driver's area on the E4 route are illustrated in Figure 17. In Figure 17b, the red line indicates the median value, while the green diamond and the blue circle indicate the average and the outlier value, respectively. Figure 14: Contributions of bands to total RF-EMF measurements on the E1 route. Figure 15: Results of (**a**) B and (**b**) RF-EMF measurements taken in the morning in the driver’s area on the E4 route. It can be observed from the figures that the bands contributing the most to the RF-EMF are bands 10, 12, and 15, corresponding to the downlink bands of the base stations. Among these bands, the highest contribution to the total RF-EMF is from band 10, constituting 43.4%. The contribution of the other bands to the total RF-EMF is presented in Figure 18 as a pie chart. A box graph illustrating the values of the B measurements conducted in the morning and evening in the remaining sections of the bus on the E4 route is presented in Figure 19. In Figure 19, the red line indicates the median value, while the green diamond and the blue  
Figure 16: Map transfer for (**a**) B and (**b**) RF-EMF measurement results on the E4 route. Figure 17: (**a**) Change in bands and (**b**) box plot display during band-selective measurements on the E4 route. Figure 18: Contribution of bands to the total RF-EMR for L1_n measurements on the E4 route. circle indicate the average and the outlier value, respectively. Statistical analyses for the data are also provided in Table 4. Upon the simultaneous examination of Figure 19 and Table 4, considering the E1 route measurement outcomes, the lowest B value is observed in the driver's area, whereas the highest value is detected in the center of the bus. The elevated values measured during the evening hours can be attributed to increased traffic density. Specifically, the highest average \(B\) value for the E1 route was 1.9355 \(\upmu\)T at L2_n, while this value was recorded as 2.4663 \(\upmu\)T for the E4 route. The results of six different RF-EMF measurements for the E4 route are depicted in Figure 20 as a box plot. In Figure 20, the red line indicates the median value, while the green diamond and the blue circle indicate the average and the outlier value, respectively. Overall, it can be observed that the measured average RF-EMF values are comparable, with a notable increase only in L1_n. Furthermore, upon an analysis of the contribution of the bands to the total RF-EMF, as illustrated in Figure 21, it is evident that the contribution of bands 10, 12, and 15 is significantly higher. On the E4 route, there are also regular non-electric buses. Similar measurements for the E4 route were conducted for conventional buses, and the evaluations of their average B values are presented in Table 5. As observed from the table, there is not much disparity between the B values measured for non-electric buses. For the L1 location, the measurement results for both normal and electric buses are quite close, whereas significant differences are noted at the L2 and L3 locations. While the measured value for the electric bus at L2 is approximately four times higher than the normal value, this difference increases approximately 5.4 times during the evening.