Passenger traffic over the Gotthard mountain line is now with hourly Regio Express services, run by SBB daughter TILO. A 6 car "Flirt" RABe 524 # 110 is running as RE 4327 from Erstfeld to Bellinzona through the Wattinger curve at Wassen.
Acela (US), TGV (FR), Velaro (Ger, although there are British, Chinese and Russian versions as well)
There are other systems, such as the Japanese Shinkansen.