Are there either any cars or trucks?
Yes, there is a truck.
    src        edge_attr  dst
0     0   to the left of   22
1     0  to the right of    6
2     0   to the left of    1
3     0  to the right of   10
4     0  to the right of    9
..  ...              ...  ...
89   26   to the left of   23
90   27   to the left of   21
91   27   to the left of   17
92   27   to the left of   26
93   27   to the left of   23

[94 rows x 3 columns]