High-speed rail in Switzerland
, Switzerland has no high-speed trains of its own yet. French TGV (TGV Lyria) and German ICE lines extend into Switzerland, but given the dense rail traffic, short distances between Swiss cities (because of the country's small size) and the often difficult terrain, they do not attain speeds higher than 200 km/h (ICE3) or 160 km/h (TGV, ICE1, ICE2). The fastest Swiss trains are the ICN tilting trains, operated by the Swiss Federal Railways since May 2000. They can reach higher speeds than conventional trains on the curve-intensive Swiss network, however the top speed of 200 km/h can only be reached on high-speed lines. The former Cisalpino consortium owned by the Swiss Federal Railways and Trenitalia used Pendolino tilting trains on two of its international lines. These trains are now operated by the Swiss Federal Railways and Trenitalia.
Eurostar
The trains are essentially modified TGV sets, and can operate at up to on high-speed lines, and in the Channel Tunnel. It is possible to exceed the 300-kilometre-per-hour speed limit, but only with special permission from the safety authorities in the respective country.
Speed limits in the Channel Tunnel are dictated by air-resistance, energy (heat) dissipation and the need to fit in with other, slower trains. The trains were designed with Channel Tunnel safety in mind, and consist of two independent "half-sets" each with its own power car. In the event of a serious fire on board while travelling through the tunnel, passengers would be transferred into the undamaged half of the train, which would then be detached and driven out of the tunnel to safety.
If the undamaged part were the rear half of the train, this would be driven by the Chef du Train, who is a fully authorised driver and occupies the rear driving cab while the train travels through the tunnel for this purpose.