Are there buses or fences?
No, there are no buses or fences.
     src        edge_attr  dst
0      0  to the right of   12
1      0   to the left of   10
2      0  to the right of   24
3      0   to the left of   23
4      0  to the right of   19
..   ...              ...  ...
180   26   to the left of   10
181   26   to the left of    6
182   26  to the right of   21
183   26  to the right of   22
184   26  to the right of   19

[185 rows x 3 columns]