This video shows signals everywhere: https://www.youtube.com/watch?v=vPE1yDddAiw https://www.youtube.com/watch?v=vPE1yDddAiw You can even see a train on the op

This video shows signals everywhere: https://www.youtube.com/watch?v=vPE1yDddAiw https://www.youtube.com/watch?v=vPE1yDddAiw You can even see a train on the opposing line stopped at a signal before the platform. You literally would have accidents daily if you had NO signals at all on such an intensive line. You cannot run more than one train on a line with no signals and not have accidents given the stopping distances of trains, you can't do it visually like a car. Perhaps you coudl get away with it on very long straight sections of track at lowish speed, but absolutely not a 30tph urban railway with curves, tunnels and frequent stations. Maybe you mean there was no automatic train protection installed? That sounds very plausible to not be done right and disabled due to wanting the line open quickly or corruption. Many train lines don't have ATP installed across the world. In the UK only a handful have lines have 'true' ATP which will stop the train if the train is speeding (right now it only stops it on most lines if it goes through a red signal, regardless of speed).