Is the traffic light on the left side or on the right?
The traffic light is on the left of the image.
     src        edge_attr  dst
0      1  to the right of   35
1      1   to the left of   27
2      1   to the left of    7
3      2   to the left of   18
4      2   to the left of    9
..   ...              ...  ...
167   38   to the left of    7
168   38   to the left of   33
169   39  to the right of    4
170   39  to the right of   21
171   39  to the right of   23

[172 rows x 3 columns]