Is there any fire hydrant or traffic light?
Yes, there is a traffic light.
    src        edge_attr  dst
0     0   to the left of    5
1     1               on    0
2     2  to the right of    8
3     2   to the left of   10
4     2  to the right of    7
5     2   to the left of    3
6     3  to the right of   14
7     3  to the right of    9
8     3  to the right of   10
9     3  to the right of    2
10    4   to the left of    9
11    4               on   15
12    5  to the right of    0
13    5  to the right of   15
14    6   to the left of    9
15    7   to the left of   14
16    7  to the right of   13
17    7   to the left of    2
18    7   to the left of   12
19    8   to the left of   12
20    8   to the left of   16
21    8   to the left of    2
22    8   to the left of   14
23    8  to the right of   13
24    9  to the right of    6
25    9  to the right of    4
26    9   to the left of    3
27    9   to the left of   11
28   10   to the left of   11
29   10  to the right of    2
30   10  to the right of   14
31   10   to the left of    3
32   11  to the right of   10
33   11  to the right of    9
34   11  to the right of   14
35   12  to the right of    8
36   12  to the right of   16
37   12  to the right of    7
38   13   to the left of    8
39   13   to the left of    7
40   14   to the left of    3
41   14  to the right of    8
42   14  to the right of    7
43   14   to the left of   11
44   14   to the left of   10
45   15   to the left of    5
46   16   to the left of   12
47   16  to the right of    8