speed improvement

Higher-speed rail (HrSR), also known as high-performance rail, higher-performance rail, semi-high-speed rail or almost-high-speed rail, is the jargon used to describe inter-city passenger rail services that have top speeds of more than conventional rail but are not high enough to be called high-speed rail services. The term is also used by planners to identify the incremental rail improvements to increase train speeds and reduce travel time as alternatives to larger efforts to create or expand the high-speed rail networks.Though the definition of higher-speed rail varies from country to country, most countries refer to rail services operating at speeds up to 200 km/h (125 mph).The concept is usually viewed as stemming from efforts to upgrade a legacy railway line to high speed railway standards (speeds in excess of 250 km/h or 160 mph), but usually falling short on the intended speeds. The faster speeds are achieved through various means including new rolling stock such as tilting trains, upgrades to tracks including shallower curves, electrification, in-cab signalling, and less frequent halts/stops.

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