Patna’s district transport office has escalated the process of converting diesel buses into compressed natural gas (CNG), converting 50 diesel buses into CNG, and will soon be handed over to the private bus operators. Moreover, 50 private diesel minibuses that are operational in Patna municipal areas are to be replaced by  March 31, 2022. The state transport department has planned on phasing out diesel buses in municipal areas of Patna and other urban pockets including Phulwarisharif, Khagaul and Danapur byJune 30, 2022. As of February 2022, more than 120 private buses have been retrofitted with CNG kit and 125 more CNG-powered buses are being procured, including 50 minibuses.