Mod that adds AŽD 97 + AŽD 99 crossing signals
The crossing is controlled by "analog" redstone strengh, based on redstone dust 2 blocks under the main crossing block
strenght of 1 or higher caused white "positive" light, that indicates that the crossing is working and connected
strenght of 11 causes the red lights to start blinking
and strenght of 13 causes the barrier to come down
