Are there traffic lights?
No, there are no traffic lights.
     src        edge_attr  dst
0      0  to the right of    8
1      0  to the right of   12
2      0  to the right of    1
3      0  to the right of    2
4      0  to the right of   15
..   ...              ...  ...
210   25   to the left of   15
211   26   to the left of   13
212   26   to the left of   14
213   26  to the right of   24
214   26   to the left of   15

[215 rows x 3 columns]