The Rhaetian Railway ABe 4/16 is a presently forthcoming class of metre gauge four car electric multiple unit trains of the Rhaetian Railway (RhB), which is the main railway network in the Canton of Graubünden, Switzerland. The class will be so named under the Swiss locomotive and railcar classification system. According to that system, ABe 4/16 denotes an electric railcar train with first and second class compartments, and a total of 16 axles, four of which are drive axles. The ABe 4/16 trains are scheduled to be delivered to the Rhaeitan Railway from late 2010. It is intended that these trains will be used mainly on commuter trains on the Rhaetian Railway's core network, which is electrified at 11 kV 16.7 Hz AC. Each of the ABe 4/16s will be equipped with comfortable air conditioned compartments for both first class and second class passengers.