What is the vehicle on the road?
The vehicle is a bus.
    src        edge_attr  dst
0     2   to the left of   11
1     2  to the right of    9
2     2            below   10
3     2   to the left of   12
4     2  to the right of    6
5     2   to the left of   16
6     2   to the left of   13
7     2  to the right of   15
8     2               on    1
9     5   to the left of   12
10    5   to the left of   11
11    5          driving    2
12    6   to the left of    2
13    6  to the right of    9
14    8  to the right of   14
15    9   to the left of    6
16    9   to the left of    2
17    9    parked behind    2
18   10            above    2
19   11  to the right of    5
20   11  to the right of    2
21   11   to the left of   16
22   12  to the right of    5
23   12  to the right of    2
24   13  to the right of    2
25   14   to the left of    8
26   15   to the left of    2
27   16  to the right of   11
28   16  to the right of    2