Which color is the road?
The road is brown.
    src        edge_attr  dst
0     0  to the right of   13
1     0  to the right of    2
2     0  to the right of   15
3     0  to the right of   12
4     1  to the right of    9
..  ...              ...  ...
77   18   to the left of   12
78   19   to the left of   12
79   19   to the left of   14
80   19   to the left of   13
81   20  to the right of    9

[82 rows x 3 columns]