Are the vehicles in the bottom part or in the top of the image?
The vehicles are in the bottom of the image.
    src        edge_attr  dst
0     0   to the left of   18
1     0               on    5
2     0  to the right of    3
3     0  to the right of    1
4     0   to the left of   17
..  ...              ...  ...
83   18  to the right of    0
84   19  to the right of   10
85   19  to the right of    1
86   20   on the side of   12
87   20   to the left of   11

[88 rows x 3 columns]