How big is the train?
The train is large.
    src        edge_attr  dst
0     0   to the left of    2
1     1             near    4
2     2  to the right of    0
3     3            above    4
4     3            above    5
5     3             near    4
6     4             near    3
7     4             near    5
8     4             near    1
9     4         crossing    0
10    5             near    4