Metra's investment in innovative, cleaner energy locomotives will be funded in part by this project which will procure multiple-unit car that produce zero mobile emissions. This multi-year, multi-phase project will acquire battery-electric trainsets. Metra will be among the first passenger rail transit agencies to purchase and operate self-propelled trainsets that will not require the construction and maintenance of wayside power. Metra estimates that replacing one old diesel locomotive with a zero-emission locomotive will reduce nitrogen oxides (NOx) emissions by more than 30 tons per year, thus significantly reducing the agency’s greenhouse gas footprint and greatly improving air quality in the region.