Explore the fascinating evolution of railway signaling, tracing the journey from early hand-held flags to today’s ...

Despite all of the advancements in technology in the series, IndyCar says the traditional cloth flags are here to stay. Kyle ...

In the late 19th and early 20th centuries, signal flags were used to alert U.S. citizens to weather conditions. Postcard of the U.S. Weather Bureau Building at Charles City, Iowa. c. 1900.