In the N700 series train-cars, which operate at the same 300 km/s as the 500 series train-cars on the Sanyo Shinkansen line, train-cars with no engine are also included, because the ability to control the idle running and skidding of wheels has increased.
山陽新幹線で500系と同じ300km/h運転を行うN700系電車は、空転及び滑走を防止する制御能力が向上したため、付随車が組み込まれている。