From 670ed0de5ba2d13da74d9f2631325f7b429f132a Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Thu, 21 Jun 2018 18:45:40 +0100
Subject: [PATCH] Fix double-accounting of bidi signals on bridge/tunnel during
 owner change

---
 src/tunnelbridge_cmd.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index 87c8927348..9c8e8d792e 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -2093,7 +2093,7 @@ static void ChangeTileOwner_TunnelBridge(TileIndex tile, Owner old_owner, Owner
 		if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.water += num_pieces;
 	}
 
-	if (IsTunnelBridgeWithSignalSimulation(tile) && IsTunnelBridgeSignalSimulationEntrance(tile)) {
+	if (IsTunnelBridgeWithSignalSimulation(tile) && tile < other_end) {
 		uint num_sigs = GetTunnelBridgeSignalSimulationSignalCount(tile, other_end);
 		Company::Get(old_owner)->infrastructure.signal -= num_sigs;
 		if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.signal += num_sigs;