As railroads underwent major changes in the second half of the 20th century, a movement was started by enthusiasts to preserve fast disappearing steam locomotives, antiquated rolling stock, and historically significant routes from possible abandonment. The Open-Sided Excursion Car was developed specifically for these railroads. Many were constructed using the chassis (and sometimes body) of gondolas or flatcars, making them a cost-effective solution to these mostly volunteer-run operations, allowing them to quickly build up a fleet of passenger-carrying cars. From these humble beginnings, the open car has today become an essential component of most tourist railroads - even when paired with traditional passenger cars - offering a thrilling open-air experience for riders as they travel through breathtaking scenery.