From 17f74e4c51bd87ee07f266d28ca70b7e00c7b19e Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Thu, 28 Apr 2016 22:19:35 +0100
Subject: [PATCH] Fix signalled bridge/tunnel not always being redrawn on
 (un)reservation.

---
 src/pbs.cpp       | 2 ++
 src/train_cmd.cpp | 1 +
 2 files changed, 3 insertions(+)

diff --git a/src/pbs.cpp b/src/pbs.cpp
index 2ba7bbf9d1..c0962557fb 100644
--- a/src/pbs.cpp
+++ b/src/pbs.cpp
@@ -126,6 +126,7 @@ bool TryReserveRailTrack(TileIndex tile, Track t, bool trigger_stations)
 			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL && !GetTunnelBridgeReservationTrackBits(tile)) {
 				SetTunnelBridgeReservation(tile, true);
 				if (IsTunnelBridgeExit(tile) && IsTunnelBridgePBS(tile)) SetTunnelBridgeExitGreen(tile, true);
+				MarkTileDirtyByTile(tile);
 				return true;
 			}
 			break;
@@ -181,6 +182,7 @@ void UnreserveRailTrack(TileIndex tile, Track t)
 			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) {
 				SetTunnelBridgeReservation(tile, false);
 				if (IsTunnelBridgeExit(tile) && IsTunnelBridgePBS(tile)) SetTunnelBridgeExitGreen(tile, false);
+				MarkTileDirtyByTile(tile);
 			}
 			break;
 
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index a96e52597b..adb8968a4f 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -3231,6 +3231,7 @@ static bool CheckTrainStayInWormHolePathReserve(Train *t, TileIndex tile)
 		if (reserved == TRACKDIR_BIT_NONE) {
 			/* next tile is not reserved, so reserve the exit tile */
 			SetTunnelBridgeReservation(tile, true);
+			MarkTileDirtyByTile(tile);
 		}
 	}
 	bool ok = TryPathReserve(t);