Traffic light

High school (ages 12+)
Safety & Emergency

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/traffic-light

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. How tall is Traffic light?1868
2. What is the device type?Automated signalling device for traffic control
3. What is the origin of first device?Gas-powered, manually operated signal installed in London
4. What is a traffic light and why do we use it?A traffic light is a device that shows red, amber, and green lights to tell cars and people when to stop, slow, or go. It keeps everyone safe at busy intersections.
5. How did traffic lights start?The first traffic light was built in 1868 in London. It was a gas‑lit, hand‑operated sign that helped people stop and go on busy streets.

Intersection Capacity: The maximum rate at which vehicles can pass through an intersection without causing excessive delays.
Variable Lane Control: Systems that dynamically change the direction or usage of traffic lanes based on real-time conditions.
Traffic Signal Synchronization: Coordinating traffic lights along a route to create 'green waves' for smoother traffic flow.