Are there any buses or cars?
Yes, there is a bus.
    src        edge_attr  dst
0     0  to the right of    6
1     3   to the left of   10
2     4   to the left of    5
3     5      waiting for   13
4     5  to the right of    4
5     6   to the left of   13
6     6   to the left of    8
7     6   to the left of    7
8     6   to the left of    0
9     7  to the right of    6
10    7   to the left of   13
11    8        on top of    7
12    8      standing on    7
13    8  to the right of    6
14   10  to the right of    3
15   13  to the right of    7
16   13  to the right of    6