Changes

[[File:Single-block.jpg|200px|thumb|left|single block signal]]Block signals allows access (green arrow down on the signal) only on the blocks which are not occupied by other train. Block is the space of railway between two signals. You can see the block status with the arrows pointing towards the segments. Red arrow means that the block in the arrow direction is occupied.<br> <br>'''ExamplesBlock signals basics'''<br><br>In [[File:Basic-segments-fin.png|350px|thumb|left|signal block on straight track]][[File:Simple-avoidance-fin.png|350px|thumb|right|station with two track and two-way signals]] On the first example left picture you can see our example oval station situation with incorrectly positioned signals. Each block is located between two signals / end of the track and colored with only one block signal presentdifferent color. This means Red is the whole track station block, blue is one the "entry" block, from one end green is the rest of the signal to anothertrack.<br>The signal In the real functional railroad with two trains, you will be always red when we put a almost immediately hit the deadlock issue with the train . The problem is in the two-way signals on a single track. Very soon the blocktrains will stay at one signal against each other.<br><br><br><br><br>[[File:Two-blockTo avoid this, you can introduce some kind of avoiding track with one-way signals(right picture).jpg|200px|thumb|left|You can notice that the station block is now split into two signals creates tracks with two blocks]]By adding second one-way singal. One "entrance" signal, one "exit" signal on . The incomming train will from the green block, to blue block. Then the other side of train enters the oval, we creates two station and blocks of trackthe red block. One Next incomming train will be able to movehave red sign on the entrance signal, because of occupied red block. The diference between left and right example is, that the train have a space to leave by the yellow block . This is effective enough on the other side of the signal will be always clearlow load railroads.