With the Re 4/4 into a New Era - In 1947 a new generation of locomotives appeared on the Swiss rail network. The Swiss Federal Railways were able to revolutionize its entire concept for motive power with the purchase of the Re 4/4 I. This locomotive had two power trucks and no pilot trucks. Its maximum speed of 125 km/h / 78 mph enabled considerably shorter trip times. This locomotive is still considered today as a milestone in the history of Swiss locomotive building. The Re 4/4 I was swift and at just 57 metric tons was a remarkably lightweight unit. It mastered its period of use extremely well. It introduced a new era in SBB passenger service with the transition from heavy, sedate express train service to accelerated city-to-city connections with short, regularly scheduled timings. The Re 4/4 I had a power output of 1,855 kilowatts / 2,520 horsepower was a very good general-purpose locomotive, whose push/pull and multiple unit controls made it suitable for a rationalized push/pull train service as well as for m.u. motive power operation. The good reserve of power for acceleration present on these locomotives with their electric resistance brakes made them the ideal combination with the comfortable SBB lightweight steel passenger cars. These train consists left their stamp for a long time on the image of passenger train service for long distance city-to-city connections.