Do you see vans to the right of the car?
No, there is a bus to the right of the car.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    5
2     0   to the left of   21
3     0   to the left of   20
4     0   to the left of   16
..  ...              ...  ...
62   19   to the left of   15
63   19   to the left of   18
64   20  to the right of    0
65   21   to the left of   17
66   21  to the right of    0

[67 rows x 3 columns]