Are the vehicles in the bottom part of the image?
Yes, the vehicles are in the bottom of the image.
    src        edge_attr  dst
0     1        on top of    8
1     1  to the right of   17
2     1  to the right of   14
3     1  to the right of    6
4     1   to the left of    4
5     1  to the right of   11
6     2           behind   17
7     2  to the right of    7
8     3     hanging from    4
9     4  to the right of   12
10    4  to the right of   11
11    4  to the right of    9
12    4  to the right of   10
13    4  to the right of    5
14    4  to the right of    1
15    5  to the right of   17
16    5  to the right of   14
17    5        on top of    8
18    5  to the right of    6
19    5   to the left of    4
20    6   to the left of   13
21    6   to the left of    1
22    6   to the left of    5
23    6   to the left of   11
24    6   to the left of    9
25    6   to the left of   10
26    7   to the left of    2
27    8            below   10
28    9  to the right of    6
29    9   to the left of    4
30   10  to the right of    6
31   10   to the left of    4
32   10            below   12
33   11         crossing    8
34   11   to the left of    1
35   11  to the right of   17
36   11  to the right of   14
37   11  to the right of    6
38   11   to the left of    4
39   11   walking across    8
40   12   to the left of    4
41   12            above   10
42   13  to the right of    6
43   13  to the right of   14
44   14   to the left of    5
45   14   to the left of   11
46   14   to the left of    1
47   14   to the left of   13
48   15   to the left of   16
49   15            below   17
50   16  to the right of   15
51   17            above   16
52   17        on top of    8
53   17   to the left of    5
54   17   to the left of   11
55   17      in front of    2
56   17   to the left of    1