美国GM公司的EMD目前正在为伯灵顿北方铁路制造4台其交流牵引电动机采用的是德国西门子公司技术的SD60型电传动内燃机车。这些机车将装用其中部“弯曲”(‘bend’-in the middle)、在通过弯道时可减轻轨道磨耗的试验型径向式转向架。这批新机车大约在一年后投入伯灵顿北方铁路的商业运营。在此之前将在美国铁路协会所属的位于科罗拉多州的普韦布洛试验中心的环形道上进行试验。这 EMD of U.S. GM is currently manufacturing four SD60 electric drive diesel locomotives for its AC traction motors for the Burlington North Railway. The locomotives will be fitted with the ’bend’-in the middle "of the center, a test-type radial bogie that reduces track wear when passing corners. About a year later, the new locomotives were put into commercial operation on the Burlington North Railway. Prior to this trial will be carried out on the roundabout of the Pueblo Test Center in Colorado, which belongs to the American Railroad Association. This