Third rail

High school (ages 12+)
Transportation

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/third-rail

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary function?To provide continuous electrical power to railway vehicles via a trackside conductor
2. What is the typical voltage range?Rarely exceeds 750 volts, commonly utilizing Direct Current (DC)
3. What is a third rail and how does it power trains?A third rail is a special rail that runs next to the train tracks. Trains have a shoe that slides on it to get electricity for their motors.
4. Why do some trains use a third rail instead of wires above the track?Third rails are easier to put in tunnels or busy city streets because they don't need big wires hanging up high. They also look cleaner.

Catenary System: An overhead network of wires used to supply electricity to trains.
Grade Separation: Ensuring railway lines are physically separated from roads and pedestrian paths.
Traction Motors: Electric motors that provide the power to move a vehicle, such as a train.