No provision of this Act relating to obstruction of or other interference with highways is to be taken to affect any right of a highway authority or other person under any enactment not contained in this Act, or under any rule of law, to remove an obstruction from a highway or otherwise abate a nuisance or other interference with the highway, or to affect the liability of any person under such an enactment or rule to proceedings (whether civil or criminal) in respect of any such obstruction or other interference.