Are there either any cars or buses in the picture?
Yes, there is a bus.
    src        edge_attr  dst
0     1   to the left of   10
1     1  to the right of    7
2     1   to the left of   13
3     1  to the right of   17
4     2  to the right of    4
5     3   to the left of    8
6     3   to the left of   19
7     4   to the left of    2
8     4  to the right of   18
9     5   to the left of    6
10    5  to the right of   15
11    6  to the right of    5
12    7   to the left of   10
13    7   to the left of   13
14    7   to the left of    1
15    8  to the right of    3
16    9  to the right of   16
17   10  to the right of   17
18   10  to the right of    1
19   10  to the right of    7
20   12             near   14
21   13  to the right of   16
22   13  to the right of    1
23   13  to the right of   17
24   13  to the right of    7
25   14             near   12
26   15   to the left of    5
27   16   to the left of   13
28   16   to the left of    9
29   17   to the left of   10
30   17   to the left of    1
31   17   to the left of   13
32   18   to the left of    4
33   19  to the right of    3