What do you think is the vehicle that drives down the black highway?
The vehicle is a bus.
    src        edge_attr  dst
0     0  to the right of    8
1     0  to the right of    9
2     0   to the left of   14
3     0   to the left of   13
4     0   to the left of   10
..  ...              ...  ...
56   16  to the right of    3
57   16  to the right of    7
58   16  to the right of   10
59   16  to the right of   14
60   17  to the right of    2

[61 rows x 3 columns]