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## About This Content
HISTORY:
One of the smallest complete railroad systems, the Museum of Science and
Industry’s original model railroad was the largest of its kind in the world
when it opened in 1941. Designed by Minton Cronkhite, the railroad covered
2,340 square feet of floor space and was built in Q scale, which paired 1:45
scale trains with 2-rail O gauge track. The various scenes on the model
railroad illustrated the role of the railroad within U.S. industry and
agriculture throughout the desert southwest. It included 1,000 feet of track
and 40 switches operated by an automatic control board.
When it closed in May of 2002, our model railroad had been in service for over
six decades, serving as one of the most well-known and beloved exhibits in the
Museum. It had seen several enhancements over the years as new technologies
helped railroads to operate more safely and efficiently. It was also one of
the first railroads in the country to run “diesel” engines as they replaced
steam engines.
Today, the Museum’s railroad exhibit, The Great Train Story, once again tells
the modern railroad story. The newer layout is 50 percent larger than the
original railroad and has the ability to operate more than 30 trains, rather
than the original 10.