Railfan

Many fans spend hours trackside to catch a "rare bird"—a locomotive with a unique paint scheme or an antique model still in service.

Some are drawn to the "how." They study track gauges, signaling systems, and the evolution of horsepower. Railfan

There is a deep social element. Through radio scanners and online forums, "foamers" (a lighthearted nickname for enthusiasts) alert each other to special shipments or "heritage units" coming down the line. Many fans spend hours trackside to catch a