Signalling is a huge issue in NYC. The control center actually has no idea where the trains are due to outdated equipment and rely on the block signals to repor

Signalling is a huge issue in NYC. The control center actually has no idea where the trains are due to outdated equipment and rely on the block signals to report roughly where the trains are at any given time. It'll be a huge project to update that and give them GPS-level accuracy on the trains.