How do traffic lights work? (Are We There Yet: Guide to Roads)

Dan and Bex are on a road trip. They are waiting at some traffic lights and wondering how changing lights help traffic – and how traffic lights might change in the future.

Even if you aren’t old enough to drive, chances are you know a lot about traffic lights. They’re signals you find on roads which help different road users to take turns, keeping things safe and smooth.

Red means stop, amber means get ready and green means – can you guess?