Clean Energy Fuels Corp. announced a contract for an estimated 47.5 million gallons of its renewable natural gas (RNG) to fuel the Los Angeles County Metropolitan Transportation Authority’s (Metro) transit bus fleet.

This agreement will mark the completion of Metro’s five-year goal to transition its diesel fleet to cleaner, low-carbon fuel, with 2,400 buses now running on RNG.

“Metro is committed to ensuring a seamless path towards a carbon neutral future,” said Cris Liban, the transit agency’s chief sustainability officer. “Our use of RNG alongside our ultra-low [nitrogen oxide] NOx engines on our existing CNG fleet provides the most cost-effective, equitable, and clean air strategy as we continue to transition to a 100% zero-emissions bus fleet by 2030 and a net zero-emissions agency by 2050.”

The fueling contract resulted from a competitive RFP process, with Metro awarding Clean Energy three fueling depots for a five-year term, with an option to extend up to three additional years. Clean Energy currently delivers RNG to five additional Metro fueling depots under a previously awarded RNG agreement.