In the new system, all terminals will be interconnected through an underground circular, one-track railway. The main terminal and city terminal will be interconnected by a two-track line (one for each direction). The math terminal also has parking tracks for inactive trains, servicing and so on. Each track is divided into track segments of a fixed size called blocks. Each terminal holds one block called a station block. Each block is equipped with an entry signal (or 'virtual gate') and multiple sensors to detect the presence of trains, identify trains and their speed and so on.