Are there either any traffic lights or stop signs that are red?
Yes, the stop sign is red.
    src        edge_attr  dst
0     0               of   14
1     0  to the right of   11
2     0   to the left of   13
3     0  to the right of   16
4     2   to the left of    6
5     2   to the left of   11
6     2   to the left of   16
7     3  to the right of   11
8     3  to the right of   15
9     3   to the left of    5
10    4               of   10
11    4   to the left of   16
12    5  to the right of   16
13    5  to the right of   15
14    5  to the right of    3
15    6  to the right of    2
16    6               on   16
17    6  to the right of   10
18    8   to the left of   16
19    8               of   10
20    8   to the left of   11
21   10   to the left of    6
22   10   to the left of   11
23   10   to the left of   16
24   11  to the right of   10
25   11  to the right of    2
26   11   to the left of   15
27   11   to the left of   14
28   11   to the left of    0
29   11   to the left of    3
30   11  to the right of    8
31   11  to the right of   17
32   12  to the right of   16
33   13  to the right of   16
34   13  to the right of   14
35   13  to the right of    0
36   14   to the left of   13
37   14  to the right of   16
38   14            below    1
39   14  to the right of   17
40   14  to the right of   11
41   15  to the right of   11
42   15   to the left of    5
43   15   to the left of    3
44   16   to the left of    5
45   16   to the left of   12
46   16   to the left of   14
47   16  to the right of    8
48   16  to the right of   17
49   16   to the left of   13
50   16  to the right of   10
51   16   to the left of   17
52   16  to the right of    2
53   16   to the left of    0
54   16  to the right of    4
55   17   to the left of   14
56   17   to the left of   16
57   17   to the left of   11
58   17  to the right of   16