The Konkan Railway (abbreviated KR) is a railway operated by the Konkan Railway Corporation, with its headquarters at CBD Belapur in Navi Mumbai, Maharashtra, India. The first passenger train ran on Konkan railway tracks on 20 March 1993, between Udupi and Mangalore. During its initial years of operation in the mountainous Konkan region, a number of accidents prompted Konkan Railway to implement new technology. Anti-collision devices, the Sky Bus and roll-on/roll-off are several of the railway's innovations. The 756.25 km (469.91 mi) long railway line connects the states of Maharashtra, Goa and Karnataka. The first train on the completed track was sent off on 26 January 1998.