Before revision: For greater flexibility and to improve car utilization, currently single-unit autoracks are being built that allow the number of loading levels, or decks, to be easily changed between bilevel (two) and trilevel (three), depending on which is in demand at the time.
After revision: For greater flexibility and to improve car utilization, single-unit autoracks are being built that allow the number of loading levels, or decks, to be easily changed between bilevel (two) and trilevel (three), depending on which is in demand at the time.