Which kind is this vehicle?
That is a bus.
   src        edge_attr  dst
0    0  to the right of   10
1    1  to the right of    4
2    3  to the right of    7
3    4   to the left of    1
4    5  to the right of    8
5    7   to the left of    3
6    8   to the left of    5
7   10   to the left of    0