Is this a train or a bus?
This is a bus.
    src        edge_attr  dst
0     0  to the right of    1
1     1  to the right of    7
2     1   to the left of    2
3     1   to the left of    0
4     2  to the right of    8
5     2  to the right of    6
6     2  to the right of    1
7     5  on the front of    9
8     6   to the left of    2
9     7   to the left of    1
10    8   to the left of    2
11    9   parked next to    2