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To change the current block a train has to reserve all blocks until he reaches a save place to stay (e.g. all blocks until the holding track in KH). If he is successful, he has to set all switches and signals on his track. It sets only the signals of the block it is currently about to enter and sets the speed of all blocks. To accelerate the speed has to be set synchronous on all used blocks. A train has to get slower before it should break, otherwise it might stop in the next segment. It should get slower, upon triggering the first contact of a block and stop upon triggering the second. The train releases all blocks after completely leaving them (the signal is set to red and the speed to 0). Upon reaching his save place, a train has to check whether he can continue. If this is not possible it must stop at the second contact.
Level Crossing
The gate should be lowered, before a train enters the block with the crossing. The bell should ring before the are lowering. After the train leaves the block, the gates should be lifted up again. The signals are used the same way as traffic lights.