Effective in 2015, the EPA will require manufacturers of locomotive diesel engines to lower particulate emissions 70% and NOx 76%, compared to engines first introduced in 2005. Alternative solutions, GE says, would likely rely on the use of a Urea exhaust additive to meet these Tier 4 emission standards, requiring railroads to build an extensive network of fueling stations across North America. But the
GE's Evolution Series Locomotive will not require the additive and railroad customers will not have to incur the costs related to rail infrastructure upgrades, the company said.