On this service, I departed Grand Central Terminal like normal. The first 2 to 3 signals I had were yellow, ultimately meaning there was probably a train in front of me. However, once I got to the third or fourth signal, I was told to stop at about the time another train was coming into the station. I waited for the train to go by, but the signal would not turn green. I looked around the map and there were no trains that would've been in my way. I waited for about 5 minutes for the signal to turn green. This put me several minutes behind schedule since the signal stayed red for no reason. Here is the footage below if more information is needed. The timestamp is at about 1:35:30 (Disclaimer: My controller died during this service so feel free to skip over that part)