Are there any trains or cars?
No, there are no trains or cars.
    src        edge_attr  dst
0     0   to the left of   17
1     0   to the left of    4
2     0   to the left of    7
3     3  to the right of    6
4     3   to the left of   17
5     4  to the right of    6
6     4   to the left of   17
7     4  to the right of    0
8     6   to the left of   12
9     6   to the left of   15
10    6   to the left of    9
11    6   to the left of    3
12    6   to the left of   13
13    6   to the left of   17
14    6   to the left of    4
15    6          holding   10
16    7  to the right of    8
17    7  to the right of    0
18    8   to the left of    7
19    8   to the left of   10
20    9  to the right of    6
21   10  to the right of    8
22   10  to the right of   11
23   11   to the left of   10
24   12  to the right of    6
25   12               on   13
26   12   to the left of   17
27   13   to the left of   17
28   13  to the right of    6
29   15   to the left of   17
30   15  to the right of    6
31   17  to the right of    6
32   17  to the right of    0
33   17  to the right of   13
34   17  to the right of    3
35   17  to the right of    4
36   17  to the right of   12
37   17  to the right of   15