https://metrarail.com/about-metra/newsr ... ocomotives
...Metra is challenging the industry to create a zero-emission commuter locomotive by converting an older engine from diesel to one powered solely by batteries.
The Metra Board of Directors at its April meeting today approved the issuance of a Request for Proposals (RFP) that will ask manufacturers to propose solutions to convert three of Metra’s older F40PH-3 diesel locomotives to zero-emission battery power. The RFP will be issued in the upcoming days; the contract is expected to be awarded in the fall and the first solutions should be delivered about 30 months later.
Metra estimates that replacing three older diesel locomotives with zero-emission batteries would reduce nitrogen oxides (NOx) emissions by more than 100 tons per year and particulate matter (PM) emissions by more than two tons per year. By replacing diesel power with battery power, Metra will significantly reduce its emissions footprint and greatly improve air quality for its riders and the Chicago region.
Metra will require the zero-emission locomotives to be fully compatible with its existing railcars and diesel locomotives. They must be capable of operating on any Metra line with trains that range in size from two to 11 cars, and they must be capable of providing a safe and comfortable ride at all speeds up to the maximum speed of 79 mph. The batteries must also power onboard systems, such as lighting, intercoms and HVAC. The locomotives may be painted in a green version of Metra’s paint scheme (per the conceptual illustrations) to indicate the green technology.