What kind of vehicle is it?
The vehicle is a bus.
    src        edge_attr  dst
0     0  to the right of    1
1     1   to the left of    0
2     1   to the left of    8
3     2   to the left of    3
4     2   to the left of   11
5     3  to the right of    2
6     5   to the left of   10
7     8  to the right of    1
8     9            below   10
9    10  to the right of    5
10   10               on    9
11   11  to the right of    2