All Class I railroads in the U.S. use Evolution series locomotives, or GEVOs. The Evolution series are GE’s most technologically advanced locomotives and the industry’s most popular freight locomotive.
GE introduced the Evolution series in 2005 and has since revamped the locomotive in accordance with EPA Tier 4 emission standards. The newest locomotive to enter the series is the ET44AC.
GE officials did not say which railroad will receive the 10,000th GEVO.