Is the signal light on the right?
No, the signal light is on the left of the image.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of    1
2     0   to the left of   10
3     1  to the right of   10
4     1  to the right of    8
5     1  to the right of    0
6     2   to the left of   13
7     2   to the left of   15
8     2   to the left of   11
9     2   to the left of    3
10    2   to the left of   16
11    3  to the right of    2
12    4     hanging from    5
13    4   to the left of    7
14    4   to the left of   15
15    5  to the right of    6
16    6   to the left of    5
17    6   to the left of   12
18    6   to the left of    7
19    7   to the left of   15
20    7  to the right of    6
21    7  to the right of    4
22    7  to the right of   12
23    7   to the left of   16
24    8   on the side of    2
25    8   to the left of    1
26    8  to the right of    0
27    8   to the left of    9
28    9  to the right of   10
29    9  to the right of    8
30   10   to the left of    9
31   10   to the left of    1
32   10  to the right of    0
33   11  to the right of    2
34   12   to the left of   15
35   12   to the left of    7
36   12  to the right of    6
37   13  to the right of    2
38   15  to the right of    4
39   15  to the right of    2
40   15  to the right of   12
41   15  to the right of    7
42   16  to the right of    2
43   16  to the right of    7