The Clean Air Locomotive and Marine Diesel Rule would set stringent emission standards and require the use of advanced technology to reduce emissions. When fully implemented, the initiative would cut particulate matter emissions from these engines by 90 percent and nitrogen oxides emissions by 80 percent. Overall benefits are estimated by the EPA to outweigh costs by more than 20 to 1.
The Clean Air Locomotive and Marine Diesel Rule would tighten emission standards for existing locomotives when they are remanufactured. Additionally, the rule sets stringent emission standards for new locomotive and marine diesel engines and sets long-term regulations that require the use of advanced technology to reduce emissions.
The locomotive remanufacturing proposal would take effect as soon as certified systems are available, as early as 2008, but no later than 2010. Standards for new locomotive and marine diesel engines would phase-in starting in 2009. Long-term standards would phase-in beginning in 2014 for marine diesel engines and 2015 for locomotives. The rule also explores a remanufacturing program for existing large marine diesel engines similar to the existing program for locomotives. Other provisions seek to reduce unnecessary locomotive idling.