Does the train to the right of the other train look red?
No, the train is black.
    src        edge_attr  dst
0     0   to the left of    5
1     0   to the left of    1
2     0   to the left of   10
3     1   to the left of    2
4     1   to the left of   14
..  ...              ...  ...
73   15   to the left of   13
74   15  to the right of   10
75   16   to the left of    7
76   16  to the right of   10
77   16   to the left of   13

[78 rows x 3 columns]