Pennsylvania Railroad used GG1s like #4918 to pull passenger trains in the Washington to New York City "Northeast Corridor." Amtrak acquired the locomotive in 1971 and renumbered it #4916. #4918 weighs 477,000 pounds and is 79'6" long. 11,000-volt AC power was supplied by overhead wires through dual pantographs located at either end of the engine. A GG1 could attain a top speed of 100 mph in passenger service and 90 mph in freight service.