Is the sign the same color as the ground?
No, the sign is red and the ground is white.
   src        edge_attr  dst
0    0               of    6
1    1               of    6
2    1  to the right of   11
3    5  to the right of   11
4    7   to the left of   10
5    9               of    0
6   10  to the right of    7
7   11   to the left of    5
8   11   to the left of    1