Avsnitt 12

In today's episode, Maddie is looking at useful lights. She shows us how traffic lights work so that vehicles can travel safely through a road junction. She visits a traffic control centre and uses a special camera high up in the air to see all the traffic in action at a busy junction. Next, Maddie visits a factory where emergency warning lights are made using computer designs . She helps to pick the components to make the lights and, using special cameras, we see how all the wires fit together to make a police light! Maddie shows us the light being fitted on top of a police car and tested for the first time.