Video surveillance in motorway tunnels is also becoming increasingly important. In the past, this was simply used for visual monitoring of the traffic inside the tubes. Thanks to increasing digitization, there are many more possibilities today. Above all the so-called automatic event detection. Based on the video images from the cameras, this recognizes whether there is any danger inside or outside the tunnel. The event detection detects whether a traffic jam is or will arise, whether an accident has occurred or whether a fire has broken out. Objects on the road are also detected so that road users can be warned at an early stage. As a result, video surveillance is also used more and more frequently for fire detection.