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Subscribe to the channel! https://bit.ly/47Vhx2q How do we build highways? - C'est Pas Sorcier How do you dig a tunnel? What do the asphalt plants that make the road and sidewalk surfacing look like? What do earthmovers do? Fred and Jamy head to Grenoble to discover the construction site of the A 51 motorway that will pass through the Alps. From the route drawn up by the surveyors to the soil study, we follow with them all the stages of building a motorway. "C'est pas sorcier", the science and discovery magazine presented by Fred, Jamy and Sabine. Aboard their laboratory truck, the three presenters take us to unusual and spectacular sites to explain the world around us. Find the shows on YouTube / cestpassorcierftv Follow us on Facebook / cestpassorcier and Twitter @cestpassorcier