The National Museum of Transportation (TNMOT) is a private, 42-acre transportation museum in the Kirkwood suburb of St. Louis, Missouri. Founded in 1944, it restores, preserves, and displays a wide variety of vehicles spanning 15 decades of American history: cars, boats, aircraft, and in particular, locomotives and railroad equipment from around the United States. The museum is also home to a research library of transportation-related memorabilia and documents.