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