Are there any ladders or traffic lights?
No, there are no ladders or traffic lights.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of   15
2     1               of    0
3     1   to the left of   15
4     2               of    7
5     2  to the right of    6
6     3               by    6
7     3  to the right of   11
8     4  to the right of   14
9     4   to the left of    7
10    5   to the left of   10
11    5   to the left of    7
12    5  to the right of   14
13    6   to the left of    2
14    6   to the left of    7
15    6  to the right of   15
16    6  to the right of    0
17    6   to the left of   13
18    6  to the right of   14
19    7  to the right of    8
20    7  to the right of   12
21    7  to the right of    4
22    7  to the right of    9
23    7  to the right of   10
24    7  to the right of    5
25    7  to the right of    6
26    7  to the right of   11
27    8  to the right of   14
28    8   to the left of    7
29    9               on    5
30    9  to the right of   14
31    9   to the left of    7
32   10  to the right of    5
33   10   to the left of    7
34   11   to the left of   13
35   11   to the left of    3
36   11   to the left of    7
37   12               on    5
38   12   to the left of    7
39   13  to the right of   11
40   13  to the right of    6
41   14   to the left of    9
42   14   to the left of    8
43   14   to the left of    4
44   14   to the left of    5
45   14   to the left of    6
46   15  to the right of    1
47   15   to the left of    6
48   15  to the right of    0
49   15               of    4