There is more to understanding railroad wayside signals than simply “green means go, red means stop.” To appreciate what the signals you see along the track are telling you, you first have to grasp a few basic concepts. Railroad traffic control boils down to three situations: trains running in the same direction on the same […]
The people who work on trains have a variety of jobs. A Norfolk Southern flagman inspects a train near Marion, Ohio. Dale A. DeVene Jr. The people who work on trains have a variety of jobs. Each member of a train crew has a specific function. Since train crews do most of their work beyond […]
Track classifications are among the most basic — and essential — operating considerations in railroading, and an army of workers keep watch over the rails. You’ve seen them out there nearly every day in their hi-rail trucks, motoring quietly up and down the main and not-so-main lines of America. Perhaps you’ve waited for them to […]
Slugs What are slugs, what do they do You’re at trackside, eyeing an approaching CSX train. The roar of working diesels increases, but it’s oddly distant, given that the engines are so close. The lead unit grinds by, eerily silent but for the humming of its traction motors, followed by two others making all the […]
Head-end power: Dinner is about to arrive at table 7 in the Southwest Chief’s Superliner dining car. Outside, the late afternoon sun illuminates exhaust blasting skyward as the locomotives up front struggle to maintain speed up the more than 3% grade leading to the top of Raton Pass in New Mexico. Downstairs in the kitchen, […]
Locomotives are the power of railroading and the industries’ most potent and popular symbols. The major types that have been used in North America are steam (now confined to museums, tourist lines, and the occasional excursion), diesel-electric (the standard of the industry), and straight electric (always a tiny minority). Steam locomotives burn coal, oil, or […]
Railroaders, and railfans, are always talking about engines: How many engines were on that train? Don’t those new engines look good (or bad)? Did you get the number of that engine? So, what’s the difference between a locomotive and an engine? We use both terms to describe the most compelling element of railroading: the machines […]
Diesel locomotives today generally have either two- or three-axle trucks, a wheel arrangement called B-B and C-C. The B-B wheel arrangement indicates a two-axle truck with both axles powered, while C-C means a truck with three powered axles. This naming convention uses letters for powered axles and numerals for non-powered “idler” axles — found on older […]
AEI data tags and readers enable rail cars to be tracked as they move across the North American rail system. The AEI (Automatic Equipment Identification) system consists of passive tags mounted on each side of rolling stock and active trackside readers. The system uses radio frequency and replaces an unsuccessful older optically-based car tracking system […]
Grade crossing installations take many forms but nearly always include the railroad symbol most familiar to the public — the highway/railroad grade crossing warning sign. Crossbuck is the correct term for the X-shaped sign located just before a road reaches railroad tracks. These signs read RAILROAD CROSSING in the U.S. and are lettered with similar words, […]
Basic railroad signal terminology Here is a glossary of railroad signal terminology. Signals are used for protection and control of train traffic. However, there is no national standard or system, so signals used by individual railroads may vary. Glossary of railroad signal terminology Absolute signal: A signal whose “stop” indication means “stop and stay.” Usually […]
Unlike modern machines, the steam locomotive — which underwent few fundamental changes in 125 years of development — openly displays many of its parts. This mechanical honesty has long captivated onlookers and invited study, but many still wonder just how steam locomotives work. In fact, entire books have been devoted to the subject. There are […]
