Transcript: Ever wonder how tunnels get cleaned? The aptly nicknamed "Octopus Truck" uses its 8 robotic arms and various brush attachments, and no detergent is needed with its eco-friendly cleaning solution. The brushes are paired with high pressure water to scrub and wash away dirt. Two people operate the truck. One person drives, and a second person operates the arms and brushes. "Octopus Truck" was created by Colas.
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