Which side is the truck on?
The truck is on the left of the image.
    src        edge_attr  dst
0     1  to the right of   14
1     1   to the left of    5
2     2  to the right of    9
3     2   to the left of    3
4     2   to the left of   16
..  ...              ...  ...
75   22  to the right of    2
76   22  to the right of    8
77   22  to the right of    7
78   22  to the right of   16
79   22  to the right of    9

[80 rows x 3 columns]