The RapidX is a rapid rail system operated by the National Capital Region Transport Corporation (NCRTC) in India's National Capital Region (NCR). The goal of the RapidX is to replace the conventional non-air-conditioned MEMU-operated local train network with a rapid rail system. The semi-high speed trainsets which are providing services on RapidX have been named as Namo Bharat and have an average speed of 100 km/h (62 mph).

The National Capital Region Transport Corporation (NCRTC) is a joint venture company of the Government of India and the states of Haryana, Rajasthan, Uttar Pradesh, and Delhi. The NCRTC is the owner of RapidX, the Regional Rapid Transit System (RRTS) project across the National Capital Region (NCR), inaugurated on 20 October 2023. It is operated by Deutsche Bahn.