Are there any traffic lights in this photograph?
No, there are no traffic lights.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    3
2     0  to the right of    1
3     1   to the left of    0
4     1   to the left of    5
5     1  to the right of    3
6     3   to the left of    1
7     3   to the left of    0
8     3  to the right of    4
9     4   to the left of    3
10    4   to the left of    6
11    5  to the right of    6
12    5  to the right of    0
13    5  to the right of    1
14    6   to the left of    5
15    6  to the right of    4