Today, Maddie is learning about helpful vehicles. She goes on a training rescue mission with a lifeboat team to find out how the equipment on a lifeboat works. She shows us how the special thermal-imaging cameras are used to find people who are in trouble - even at night! Next, she visits a quarry to see how gravel, sand, cement and water are mixed together to make concrete. Maddie uses her special cameras to follow the journey the ingredients take from the quarry to the plant where everything is mixed together. We see how the mixing lorry then takes the concrete to the building site and how it is poured to make a road!

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.