## 3 Results
### Distribution of Deviation for Right-Hand-Side Trajectories  
For results interpretation purposes, the following qualitative groups of measured deviations were formed: \"small deviations\" are deviations ranging from 0.00 to 0.15 m, \"medium deviations\" are deviations ranging from 0.15 to 0.25 m, and \"large deviations\" are deviations over 0.25 m. Distributions of deviations of the right-hand-side body and chassis envelopes are presented in Figures 11-14. Figure 10: Body left-hand-side trajectory deviations. Figure 11: Distribution of deviation frequency for right-hand-side trajectories. Figure 12: Distribution of deviation frequency for right-hand-side trajectories at cross-sections 1–3. Figure 13: Distribution of deviation frequency for right-hand-side trajectories at cross-sections 4–10. When the distribution of all 650 measured deviations of right-hand-side trajectories (Figure 11) is observed, it can be concluded that over 70% of these deviations belong to the group \"small deviations\", and 20% of the measured deviations of right-hand-side trajectories belong to the group \"medium deviations\". \"Large deviations\" were not recorded for roundabouts with an outer radius over 22.0 m, and \"medium deviations\" were recorded on all investigated roundabout schemes. When the distribution of all 150 measured deviations of right-hand-side trajectories on cross-sections 1-3 (Figure 12) is observed, it can be concluded that over 70% of these deviations belong to the group \"small deviations\" (with 63% of deviations that are in the upper third of the group range, from 0.10 to 0.15 m). Again, 20% of measured deviations of right-hand-side trajectories on cross-sections 1-3 belong to the group \"medium deviations\". \"Large deviations\" were not recorded for roundabouts with an outer radius under 14.5 m and over 22.0 m. Deviations of up to 0.40 m were not recorded. Deviations of up to 0.35 m were recorded on roundabouts with an outer radius smaller than 17.0 m. Deviations of up to 0.30 m were recorded on roundabouts with an outer radius smaller than 22.5 m. \"Medium deviations\" were recorded on all investigated roundabout schemes. When the distribution of all 350 measured deviations of right-hand-side trajectories on cross sections 4-10 (Figure 13) is observed, it can be concluded that 85% of these deviations belong to the group \"small deviations\", and 10% of the measured deviations of right-hand-side trajectories on cross-sections 4-10 belong to the group \"medium deviations\". \"Large deviations\" were not recorded for roundabouts with an outer radius over 16.5 m. Deviations of up to 0.40 m were recorded on roundabouts with an outer radius smaller than 14.5 m. Deviations of up to 0.35 m were recorded on roundabouts with an outer radius smaller than 16.0 m. Deviations of up to 0.30 m were recorded on roundabouts with an outer radius smaller than 17.0 m. Deviations of up to 0.30 m were recorded on roundabouts with an outer radius smaller than 17.0 m. \"Medium deviations\" were not recorded for roundabouts with an outer radius over 20.0 m.  
When the distribution of all 150 measured deviations of right-hand-side trajectories on cross sections 11-13 (Figure 14) is observed, it can be concluded that 40% of these deviations belong to the group \"small deviations\", and 45% of the measured deviations of right-hand-side trajectories on cross sections 11-13 belong to the group \"medium deviations\". \"Large deviations\" were not recorded for roundabouts with an outer radius over 19.0 m. Deviations of up to 0.40 m were recorded on roundabouts with an outer radius smaller than 14.5 m. Deviations of up to 0.35 m were recorded on roundabouts with an outer radius smaller than 17.0 m. Deviations of up to 0.30 m were recorded on roundabouts with an outer radius smaller than 17.0 m. \"Medium deviations\" were recorded on all investigated roundabout schemes. Based on the presented results, the following conclusions can be drawn.