Are there red trains or buses?
Yes, there is a red train.
    src        edge_attr  dst
0     0  to the right of    2
1     0  to the right of    1
2     1   to the left of    0
3     1   to the left of    3
4     1  to the right of    2
5     2   to the left of    3
6     2   to the left of    1
7     2   to the left of    0
8     3   to the left of    9
9     3   to the left of    6
10    3  to the right of    5
11    3  to the right of    1
12    3  to the right of    2
13    5   to the left of    3
14    5           beside    3
15    5   to the left of   10
16    6   to the left of    9
17    6  to the right of    3
18    7   to the left of    8
19    8  to the right of    7
20    9  to the right of    6
21    9  to the right of    3
22   10  to the right of    5