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Glossary
    All roller coasters consist of small open cars that run on inclined railway tracks.  These tracks often include twists, loops, and drops.  
 
    By the 1920`s, there were about 2,000 roller coasters in North America.  Today, there are about 175 large, permanent roller coasters in the United States.  Some are reported to go about 70 miles an hour.
 
Types
 
Wooden Coasters
 
Woods and Steels
 
Steel Coasters
 
Corkscrews
 
Other Coasters