| The popularity of commuter trains brought about the development of the G5s, the largest and heaviest ten-wheelers ever built. They filled the need to combine high-speed service with the demands of frequent starts and stops. Designed by Pennsylvania Railroad mechanical engineer, William Kiesel, this compact locomotive was capable of rapid acceleration with a heavy train. Originally planned for the Pittsburgh area, G5 class locomotives soon began operating in Philadelphia, Chicago, Long Island, and Grand Rapids. From big cities to small towns, the G5 became part of the daily routine for millions |