It seems this is the cause of my game crashing as I've repeated the process several times. What is really bad is I can no longer go into the world after this happens as it crashes upon loading it in. Please fix this as it would be most helpful.

Ensure you are using the proper versions of Traffic Control and Immersive Railroading.

This the error I get:

Description: Exception in server tick loop

java.lang.NoSuchMethodError: cam72cam.mod.math.Vec3d.internal()Lnet/minecraft/util/math/Vec3d;
at com.clussmanproductions.trafficcontrol.util.ImmersiveRailroadingHelper.getNextPosition(ImmersiveRailroadingHelper.java:111)
at com.clussmanproductions.trafficcontrol.scanner.Scanner.tick(Scanner.java:84)
at com.clussmanproductions.trafficcontrol.event.WorldEventHandler.onTick(WorldEventHandler.java:54)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_30_WorldEventHandler_onTick_WorldTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:274)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:776)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:279)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Unknown Source)