Rail transportation is run by Central Railway, Western Railway, South Central Railway and South East Central Railway zones of the Indian Railways with the first two zones being headquartered in Mumbai, at Chhatrapati Shivaji Maharaj Terminus (CSMT) and Churchgate respectively and Konkan Railway which is headquartered in Navi Mumbai. The Mumbai Rajdhani Express, the fastest rajdhani train, connects the Indian capital of New Delhi to Mumbai. Thane and CSMT are the busiest railway stations in India, the latter serving as a terminal for both long-distance trains and commuter trains of the Mumbai Suburban Railway.