Are there any buses or cars?
Yes, there is a bus.
     src        edge_attr  dst
0      0  to the right of   18
1      0  to the right of    9
2      1   to the left of   12
3      1  to the right of    7
4      1   to the left of   22
..   ...              ...  ...
106   23   to the left of    9
107   23   to the left of   18
108   23   to the left of    1
109   24   to the left of   11
110   24  to the right of   19

[111 rows x 3 columns]