Is there a truck on the road?
No, there is a car on the road.
    src        edge_attr  dst
0     0  to the right of    5
1     0  to the right of    2
2     0  to the right of    4
3     0               on    8
4     1               on    8
5     2               on    8
6     2  to the right of    4
7     2   to the left of    0
8     2  to the right of    5
9     3               on    4
10    4   to the left of    2
11    4   to the left of    0
12    4   to the left of    5
13    5  to the right of    4
14    5   to the left of    0
15    5   to the left of    2
16    7               on    6