What vehicle is it?
The vehicle is a bus.
    src        edge_attr  dst
0     0   to the left of    7
1     0  to the right of    3
2     0  to the right of    2
3     0   to the left of    6
4     0   to the left of    5
5     2   to the left of    0
6     3   to the left of    0
7     4   to the left of    5
8     4   to the left of    7
9     4   to the left of    6
10    5         entering    0
11    5  to the right of    0
12    5   to the left of    7
13    5  to the right of    4
14    6  to the right of    0
15    6  to the right of    4
16    7  to the right of    0
17    7  to the right of    5
18    7  to the right of    4