CumminsWestport Inc. (CWI) and Cummins India Ltd. (CIL) announced that the Delhi Transport Corp. (DTC) ordered 3,125 natural gas buses equipped with CWI's B Gas Plus engines. The 230 horsepower B Gas Plus engines, powered by compressed natural gas (CNG), are licensed by CWI and manufactured by CIL.

According to NGVAmerica, the New Delhi Natural Gas Vehicle Program has halved air pollution numbers in the city from 10 years ago. Approximately 60,000 auto rickshaws in New Delhi, India were required to convert to compressed natural gas (CNG) for fuel. A decade later, the government issued a report hailing the success of the program, showing that the pollution rate was cut in half despite the fact that the number of vehicles on the road doubled.

Outside of New Delhi, ten other major Indian cities also have aggressive natural gas vehicle conversion programs in an attempt to cut petroleum use. India imports 70 percent of its diesel and gasoline.