RAILROAD QUESTIONS, ANSWERED
Did You Know?
From the power at the front to the last car in line, explore the details that explain how trains move freight across the country.
Choose a questionFreight train photograph: credit and license information in Photo Credits.
START WITH WHAT YOU’RE WONDERING
Big trains bring big questions.
There usually isn’t one number that fits every train. Locomotive model, train weight, terrain, weather and operating conditions all matter. These guides explain the factors behind the answer.
POWER & PERFORMANCE
What can a locomotive do?
How much horsepower does a train have?
See how locomotive ratings add up—and why horsepower is only part of the story.
Read the answer →Horsepower vs. tractive effort
Learn why pulling a heavy train from a stop is different from moving it at speed.
Understand the difference → HAULING CAPACITYHow much can a locomotive pull?
Track conditions, grades, car weight and available power all shape the answer.
Explore the factors → FUELHow much fuel does a locomotive use?
Find out why fuel use changes with the work a locomotive is doing.
Read the guide →A FREIGHT TRAIN IS A SYSTEM
Weight, speed and stopping all connect.
Thousands of tons of cars move as one train. Brakes, couplers, locomotive placement and route conditions shape how it operates.
THE WHOLE TRAIN
How does the train behave?
Why are freight trains so long?
Explore capacity, efficiency, train makeup and the limits that affect train length.
Find out why →How heavy is a freight train?
Compare the pieces that determine a train’s total weight.
See what adds up → SPEEDHow fast do freight trains go?
Learn why track, equipment and operating limits affect speed.
Read about train speed → BRAKINGHow long does a freight train take to stop?
Understand the distance, reaction time and conditions involved in stopping a train.
Explore stopping distance → DISTRIBUTED POWERWhy are locomotives sometimes in the middle?
Distributed power can help manage forces along a long train.
See how it works → AIR BRAKESHow do freight-train air brakes work?
Follow the basic brake system that reaches through a train’s cars.
Learn the basics →STILL CURIOUS?
Ask the Conductor.
Have a railroad question of your own? Send it to the AI Conductor and keep exploring.