 The circular nature of the Mulberry Island and James River subdivisions meant that the running of trains would concentrate flange wear on the outer wheels of cars and locomotives.To minimize excessive and uneven flange wear, all of the FEMRR rolling stock had to be turned through the wye each quarter.Every piece of rolling stock on the railroad had a red disc painted on one side, about 18 inches from the right end of the equipment as seen from that side.