From 25a467730e4862cfb24d7e0c046e11bdfd352bd9 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Tue, 16 Nov 2021 02:49:44 +0000
Subject: [PATCH] Fix signals on approach to tunnel/bridge entrance showing
 wrong aspect

When signal change propagated outward from the tunnel/bridge,
such as in tunnel/bridge signal add/change.
---
 src/signal.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/signal.cpp b/src/signal.cpp
index dd4811e604..0419963168 100644
--- a/src/signal.cpp
+++ b/src/signal.cpp
@@ -464,6 +464,10 @@ static SigInfo ExploreSegment(Owner owner)
 							info.flags |= SF_FULL;
 							return info;
 						}
+						if (_extra_aspects > 0 && IsTunnelBridgeSignalSimulationEntrance(tile)) {
+							info.out_signal_tile = tile;
+							info.out_signal_trackdir = GetTunnelBridgeEntranceTrackdir(tile, tunnel_bridge_dir);
+						}
 						Trackdir exit_track = GetTunnelBridgeExitTrackdir(tile, tunnel_bridge_dir);
 						exitdir = TrackdirToExitdir(exit_track);
 						enterdir = ReverseDiagDir(exitdir);