The first multiple unit trainsets were bought for the introduction of the Taktfahrplan on the line Zurich–Meilen–Rapperswil in 1967: RABDe 12/12 "Mirage" (1965) and RABDe 8/16 "Chiquita" (1976). Multiple unit trainsets started to prevail in the 1990s, especially for commuter traffic: RABDe 500 "ICN" (1999), RABe 523 (et al.) "FLIRT" (2004), RABe 514 "DTZ" (2006), and RABe 503 (2008). While locomotive-hauled trains are rarely seen in commuter traffic nowadays, they are still the usual in intercity traffic. In 2011, Stadler's RABe 511 were introduced in Zurich's S-Bahn and in 2012 was introduced as a Regional Express between Geneva and Romont and Geneva and Vevey and Bern and Biel.