ABSTRACT
High-speed ground transportation (HSGT) refers to rail services that use appropriate technology that allows trains to operate at speeds over 200 kph (125 mph) in revenue service. This technology consists of trains, track, and other necessary equipment. There are two major types of technology used to achieve such speeds:
• Trains that operate using steel-wheel-on-steel-rail technology and are powered by either electric or diesel locomotives. These are called high-speed rail (HSR) trains.
