Scoil Chaitríona Junior, Renmore

How Do Traffic Lights Work?

24-February-26
How Do Traffic Lights Work?

is Engineers Week. We know that engineers identify problems and find solutions.

Today we went looking at traffic lights in our locality.

We watched the sequencing of the lights and discovered that lights turn from green to amber (orange) to red, and then back to green again.

Pedestrian lights do the same, but at opposite timings from the traffic lights for cars.

We were especially impressed with the "map" of the road that is on the traffic lights box. It shows the road lay out to people who can't see very well! We also noticed that the path beside the traffic lights is red and bumpy. This is to help people who can't see but who use a stick to help them "see".

We also listened to the different sounds that traffic lights make. Different sounds with different messages (stop and go).

Lastly we found a few other objects that we know engineers made...ramps, kerb drains, flagpoles, chains for the gate. We also spotted some objects that are not man made. They are natural (like butterflies and daffodils).

We realise that being an engineer means working out practical solutions to make life easier. It sounds like a really fun job.

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