The Delhi–Meerut Regional Rapid Transit System is a partially operational 82.15 km (51.05 mi)-long semi high-speed rail and regional transit corridor that will connect the National Capital Region (NCR) cities of Delhi, Ghaziabad and Meerut. It is the first of the four rapid rail corridors planned under the first phase of the RapidX project managed by the National Capital Region Transport Corporation (NCRTC). Designed to allow a maximum speed of 180 km/h (110 mph), the distance between Delhi and Meerut will be covered in less than 60 minutes. The project is being executed at a cost of ₹30,274 crore (US$3.8 billion). It will start from Jangpura as the starting station, run through Sarai Kale Khan, the terminal for the three planned corridors, both in Delhi, and end in Modipuram in Meerut. It will have 16 stations and two depots at Duhai and Modipuram.

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.