How are the vehicles that are full of people called?
The vehicles are cars.
    src        edge_attr  dst
0     0  to the right of    6
1     0   to the left of   12
2     0  to the right of    5
3     0  to the right of    9
4     1   to the left of   13
5     1   to the left of   15
6     1   to the left of    5
7     1  to the right of    4
8     1   to the left of   12
9     2   to the left of    6
10    3  to the right of   14
11    4   to the left of    6
12    4   to the left of    1
13    4   to the left of    9
14    5   to the left of   12
15    5   to the left of   15
16    5  to the right of    1
17    5  to the right of    9
18    5   to the left of    0
19    5  to the right of    6
20    6  to the right of    7
21    6   to the left of    9
22    6   to the left of    5
23    6  to the right of    4
24    6   to the left of    0
25    6   to the left of   13
26    6  to the right of    2
27    6   to the left of   15
28    6          full of    1
29    7   to the left of    6
30    7   to the left of    9
31    9   to the left of    5
32    9  to the right of    4
33    9  to the right of    7
34    9  to the right of    6
35    9   to the left of    0
36    9   to the left of   13
37    9   to the left of   12
38    9   to the left of   15
39   12  to the right of   15
40   12  to the right of    0
41   12  to the right of    1
42   12  to the right of    9
43   12  to the right of    5
44   13  to the right of    9
45   13  to the right of    1
46   13  to the right of    6
47   14   to the left of    3
48   15  to the right of    5
49   15  to the right of    9
50   15  to the right of    1
51   15  to the right of    6
52   15   to the left of   12