Are there any buses in front of the trees in the scene?
No, there is a train in front of the trees.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of    6
2     0   to the left of   14
3     0   to the left of   13
4     0  to the right of    1
..  ...              ...  ...
81   15   to the left of   13
82   15  to the right of    0
83   15  to the right of    7
84   15  to the right of   14
85   15  to the right of    6

[86 rows x 3 columns]