Inventions · Topic 42 of 112
The Traffic Light
⭐ MasteredTraffic lights control the flow of cars and people at junctions by showing red, amber and green lights in a set order. They help keep roads safe.
💡 Fun fact
The first traffic light was installed in London in 1868 and was powered by gas.
All about The Traffic Light
Traffic lights control the flow of cars and people at junctions by showing red, amber and green lights in a set order. They help keep roads safe.
The first traffic light was installed in London in 1868.
Red means stop, amber means prepare to stop, and green means go when it is safe. Early traffic lights were developed in the early 1900s and have been improved ever since.
Pedestrian crossings often have their own lights, which show when it is safe to cross.
🎮 Try it yourself!
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Real-life uses of The Traffic Light
- Crossing roads safely
- Managing traffic at junctions
- Teaching road safety
Frequently asked questions about The Traffic Light
What do traffic lights show?
Red, amber and green.
Where was the first installed?
London.