FT How Freight Trains Work

What you’ll learn

1. The freight jobIdentify the major components and purpose of a freight train.A freight train is a coordinated system for moving varied loads over a rail network.
2. Locomotive powerExplain how diesel-electric locomotives produce controlled pulling force.Diesel engines generate electricity for traction motors that turn the driving axles.
3. Cars and wheelsetsCompare common freight-car types and describe the wheelset's job.Specialized cars carry different loads while trucks and wheelsets support and guide them.
4. CouplersExplain how couplers connect cars and transmit pulling and pushing forces.Knuckle couplers join cars, while slack and buff forces shape train handling.
5. Air brakesTrace how a pressure change applies and releases conventional freight-car brakes.A continuous air pipe lets each car use stored air to apply its brakes.
6. Train handlingDescribe the roles of dynamic braking and distributed power in long trains.Engineers manage speed and forces with locomotive braking, air brakes, and locomotive placement.
7. Rail yardsExplain how yards inspect, classify, switch, and assemble cars.Yards are sorting and staging systems that create route-specific consists.
8. Intermodal movementExplain how containers transfer between rail, truck, and ship.Well cars carry containers efficiently while terminals coordinate the mode changes.
9. The track and networkIdentify the infrastructure and control systems a freight train needs.Rails, structures, signals, dispatching, and terminals create the train's path through the network.
10. End-of-train safetyDescribe what an end-of-train device monitors and what it does not replace.Rear telemetry adds information about train integrity and brake conditions to other safeguards.
11. The complete journeySynthesize the equipment, people, rules, and interfaces that make freight movement work.A freight train is a monitored chain from customer load to final terminal handoff.

Questions this course answers

Grounded in trusted sources

• Association of American Railroads, Freight Rail Operations 101: https://www.aar.org/operations-101/
• Association of American Railroads, Freight Rail Facts and FAQs: https://www.aar.org/faqs/
• Federal Railroad Administration, Freight Rail Safety and Motive Power and Equipment: https://railroads.dot.gov/railroad-safety/divisions/motive-power-and-equipment
• Federal Railroad Administration, Rigorously Examines Safety and Quality of Life Implications of Long Trains: https://railroads.fra.dot.gov/about-fra/communications/newsroom/press-releases/fra-rigorously-examines-safety-and-quality-life-0
• U.S. Department of Transportation, 2026 National Freight Strategic Plan: https://www.transportation.gov/sites/dot.gov/files/2026NationalFreightStrategicPlan_FINAL.pdf
• Wikimedia Commons MediaWiki API image records: https://commons.wikimedia.org/w/api.php

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