The Los Angeles County Metropolitan Transportation Authority (Metro) recently completed an engine retrofit project to reduce emissions on a significant number of its fleet of more than 2,200 compressed natural gas (CNG) buses.
Metro repowered 125 of its transit buses with the Cummins Westport ISL G Near Zero and L9N heavy-duty natural gas engines, which are expected to reduce emissions of nitrogen oxides (NOx) by 90% and greenhouse gases by 9%.
By NGT News