What kind of vehicle is in the intersection?
The vehicles are cars.
    src        edge_attr  dst
0     1   to the left of   13
1     3   to the left of   15
2     4               on    5
3     5   to the left of   22
4     8  to the right of   13
5    10   to the left of   19
6    11  to the right of   15
7    12  to the right of   18
8    12   to the left of   14
9    13  to the right of    1
10   13   to the left of    8
11   14  to the right of   12
12   14  to the right of   18
13   15  to the right of    3
14   15   to the left of   11
15   15  to the right of   20
16   16               in   18
17   18   to the left of   14
18   18   to the left of   12
19   19  to the right of   10
20   20               on    2
21   20           riding    2
22   20   to the left of   15
23   22  to the right of    5