delivered in 2013. SD70ACe-BB (2015-present) In October 2015, EMD started producing SD70ACe-BB locomotives for Brazilian railroads. SD70ACe/45 (2004-present) The SD70ACe/45 is a diesel-electric locomotive built by EMD plant in Sete Lagoas, MG Brazil. Different from the SD70ACe in North America, the SD70ACe/45 has a longer frame (76 ft. 6 in.) and three radiator fans on the radiator section since it uses the same car body of the SD80ACe produced by EMD plant in London, Canada to Vale mining in Brazil. It uses gauge. 80 SD70ACe/45s had been built. SD70IAC (2019-present) In early 2019 with the delivery of the new SD70ACe-T4C locomotives to Norfolk Southern, a new type of the T4C (Tier 4 Credit) locomotives was rolled out of Progress Rail in Muncie, Indiana. The SD70IAC, SD standing for Special Duty, 70 standing for 70 series, and IAC standing for Individual Axle Control. They are still classified as SD70ACe's on the side of the locomotive but are designated as SD70IAC within the cab controls. The new IAC system improves the existing traction system. SD70ACe/LW (2007, 2021-present) The SD70ACe/LW is designed specifically for rail networks using Russian gauge, featuring a new isolated cab similar to the flat nosed cab of the GT46-ACE GEN II. The SD70ACe/LW has a 16-710G3C-T2 prime-mover with 4,500 horsepower. It uses an AC traction system with a top speed of 74 mph (120 km/h). Although it was designed in 2007, the first orders only occurred in mid-2021, when 16 were purchased for the Mongolian Tavan Tolgoi-Gashuunsukhait Railway project. Rebuilds SD70ACU The SD70ACU was first built by EMD and later rebuilt by Norfolk Southern. It is originally an SD90MAC (or better known as a SD9043MAC) that has been rebuilt to renew its Mitsubishi electrical components and replace the cab with the new EMD Phase-II cab to comply with the most recent safety requirements. These locomotives are similar to the SD70ACe model, but the main body features are all reminiscent to the SD90MAC features. They also have the latest EMD cab that meets current FRA crashworthiness standards. These locomotives also have the Ultra Cab II, locomotive speed limiter (LSL), and cab signals. 100 of the 110 units Norfolk Southern purchased were originally SD9043MACs previously operated by Union Pacific. The other 10 units were acquired by a trade with Cit Group for MP15DCs. All NS-owned SD9043MACs were rebuilt by NS at its shops in Altoona, Pennsylvania. By May 7, 2019, all