dict(
        type="Local3DBBoxExpand",
        expand_widths=[0.20, 0.40],  # 10cm - 20cm to each side
        label_ids=[0],  # car
        expand_lengths=None,  # no expand
    ),
    dict(
        type="Local3DBBoxExpand",
        expand_widths=[0.50, 0.80],  # 25cm - 40cm to each side
        label_ids=[1],  # trucks
        expand_lengths=[0.4, 0.60],  # 20cm - 30cm to each side
    ),
    dict(
        type="Local3DBBoxExpand",
        expand_widths=[0.5, 0.8],  # 25cm - 40cm to each side
        label_ids=[2],  # buses
        expand_lengths=[0.5, 0.9],  # 25cm - 45cm to each side
    ),