Is 'Car/Vehicle' one of your training dataset as well? I am using MOT17 dataset for my research as well but I am not sure if it includes Cars/Vehicles.
As MOTchallenge addressed, only "pedestrians" class is used for evaluation and the whole training/testing processes were performed only on pedestrians.
Is 'Car/Vehicle' one of your training dataset as well? I am using MOT17 dataset for my research as well but I am not sure if it includes Cars/Vehicles.