What kind of vehicle is behind the wires?
The vehicle is a train.
    src        edge_attr  dst
0     0      in front of    5
1     0  to the right of   29
2     0  to the right of   28
3     1   to the left of    3
4     1   to the left of   31
..  ...              ...  ...
79   28   to the left of    0
80   29   to the left of    5
81   29   to the left of    0
82   31  to the right of    1
83   31  to the right of    3

[84 rows x 3 columns]