An imaging unit is provided and placed in an access opening of a storage container of a transport vehicle, where the imaging unit includes a mounting assembly including an upper member and a mounting arm extending from the upper member, the upper member configured to rotate the mounting arm about a longitudinal axis and a camera unit rotatably attached to the mounting arm and configured to rotate about a lateral axis that is transverse to the longitudinal axis, where the camera unit is rotated about the longitudinal axis and the lateral axis to a designated position within the storage container and takes at least one image of the inner surfaces of the storage container.