NS DD-AR, full name dubbeldeksaggloregiomaterieel, were built by Talbot or De Dietrich and Adtranz between 1992 and 1998. They are operated in the Netherlands by the Nederlandse Spoorwegen. This class is a type of an electric multiple unit and was delivered in two batches as DDM-2 and DDM-3 resembling the bilevel rail cars series DDM-1 from 1985