Is there any red train or bus?
No, there is a bus but it is green.
    src        edge_attr  dst
0     2  to the right of   23
1     2  to the right of    3
2     2   to the left of   28
3     3   to the left of   21
4     3   to the left of    2
..  ...              ...  ...
88   32  to the right of   21
89   32  to the right of   16
90   33  to the right of   22
91   33  to the right of   21
92   33  to the right of   23

[93 rows x 3 columns]