Changes

| Two way signal

| [[File:Two_way_signal.JPG|125px]]

| Allowing trains to pass in both ways - mostly used in dead end stations with low traffic.

|-

| One way signal

| [[File:One_way_signal.JPG|125px]]

| Allowing trains to move only in one direction - often used on double tracks with high traffic.

|-

|}

==Block signals explained==