Indian locomotive class WAG-12

The Indian locomotive class WAG-12B is a class of 25 kV AC twin section electric locomotives developed in 2017 by Alstom with technological collaboration with Indian Railways, with the name standing for wide gauge, alternating current, goods traffic, locomotive 12. They entered trial service in 2019, and as of March 2026 a total of 598 WAG-12B had been built at the Electric Locomotive Factory, Madhepura, Bihar, India. With a power output of 12,000 hp the WAG 12 is twice as powerful as its predecessor, the WAG-9, and was developed for dedicated freight corridors, where it hauls freight trains weighing more than 6,000 tonnes at speeds of 100 to 120 km/h, doubling the average speed of freight trains in the sector. The origins can be traced to 2006, when the Government of India approved the Dedicated Freight Corridor project; in June 2008 the Ministry of Railways invited global bids to design and manufacture the locomotives, which attracted General Electric, Alstom, Bombardier Transportation, Siemens Mobility, China CNR and CSR Corporation, and in November 2015 Alstom was finally awarded the contract to build the locomotives. The contract, worth 25,000 crore rupees, created a joint venture for the project, and Alstom announced that the new locomotive would be based on its Prima T8 model.