What is the vehicle on the road that looks gray?
The vehicle is a truck.
     src        edge_attr  dst
0      0   to the left of   26
1      0               on    9
2      0   to the left of    8
3      0  to the right of    4
4      1      in front of    9
..   ...              ...  ...
100   26   to the left of    5
101   26  to the right of    0
102   26       driving on    9
103   26  to the right of   24
104   26  to the right of   22

[105 rows x 3 columns]