Does the truck have a different color than the taxi?
No, both the truck and the taxi are white.
    src        edge_attr  dst
0     1  to the right of   15
1     1   to the left of    2
2     1  to the right of    4
3     1  to the right of   11
4     1  to the right of   18
5     2  to the right of   17
6     2  to the right of    1
7     2  to the right of   14
8     2  to the right of   13
9     3   to the left of   12
10    3  to the right of   19
11    3  to the right of   16
12    4  to the right of   11
13    4   to the left of    1
14    4  to the right of   18
15    6   to the left of   17
16    6   to the left of   18
17    6   to the left of   12
18    6   to the left of   15
19    6   to the left of   11
20    6   to the left of   14
21    7  to the right of   20
22    7  to the right of    9
23    7  to the right of   10
24    9  to the right of   20
25    9   to the left of    7
26   10   to the left of   13
27   10   to the left of    7
28   11  to the right of    6
29   11   to the left of   15
30   11   to the left of    4
31   11   to the left of    1
32   12  to the right of    6
33   12  to the right of    3
34   12  to the right of   16
35   12  to the right of   19
36   13   to the left of    2
37   13  to the right of   10
38   14   to the left of    2
39   14  to the right of    6
40   15  to the right of    6
41   15  to the right of   11
42   15  to the right of   18
43   15   to the left of    1
44   16   to the left of   12
45   16   to the left of    3
46   17   to the left of    2
47   17  to the right of    6
48   18   to the left of    4
49   18  to the right of    6
50   18   to the left of    1
51   18   to the left of   15
52   19   to the left of    3
53   19   to the left of   12
54   20   to the left of    9
55   20   to the left of    7