Are there trains or trucks that are not white?
No, there is a truck but it is white.
    src        edge_attr  dst
0     0   to the left of    3
1     1  to the right of    8
2     1  to the right of    4
3     2  to the right of   14
4     2  to the right of    6
5     3  to the right of    6
6     3  to the right of   12
7     3  to the right of   14
8     3  to the right of    0
9     4   to the left of    1
10    4   to the left of    7
11    4   to the left of    8
12    4   to the left of   13
13    4  to the right of   11
14    4   to the left of   14
15    4               of   12
16    6   to the left of    2
17    6   to the left of    3
18    7  to the right of   11
19    7   to the left of   10
20    7  to the right of    4
21    7  to the right of    8
22    8  to the right of    4
23    8   to the left of   13
24    8  to the right of   11
25    8   to the left of    1
26    8   to the left of    7
27    8   to the left of   14
28    8               of   12
29    9  to the right of   11
30   10  to the right of   12
31   10  to the right of   13
32   10  to the right of    7
33   10          next to   12
34   11   to the left of    7
35   11   to the left of    8
36   11       walking on    9
37   11   to the left of    9
38   11   to the left of    4
39   11               by   12
40   12   to the left of   10
41   12   to the left of    3
42   12               on    9
43   12             near   10
44   13   to the left of   10
45   13  to the right of    8
46   13  to the right of    4
47   14               of   12
48   14   to the left of    2
49   14  to the right of    4
50   14   to the left of    3
51   14  to the right of    8