To the car driver waiting for the green light, the busy intersection in the heart of the city looks no different from any other morning. They don't realize that they are in the middle of a building site – or on top of one to be more precise. Just a few meters below them, a dazzling beam of light cuts through the darkness and startles the underground "inhabitants". A camera lens is transmitting images of wet, cracked walls to the surface where the operator intensively watches his monitor while he controls the robot. Not a scene from a science-fiction or horror film, but modern everyday life in sewer renovation. Motors from FAULHABER are used for camera control, tool functions and the wheel drive.