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