diff --git a/src/vehicle.h b/src/vehicle.h
--- a/src/vehicle.h
+++ b/src/vehicle.h
@@ -610,6 +610,7 @@ uint32 VehicleEnterTile(Vehicle *v, Tile
 
 StringID VehicleInTheWayErrMsg(const Vehicle* v);
 Vehicle *FindVehicleBetween(TileIndex from, TileIndex to, byte z, bool without_crashed = false);
+Vehicle *GetVehicleTunnelBridge(TileIndex tile, TileIndex endtile);
 
 bool UpdateSignalsOnSegment(TileIndex tile, DiagDirection direction);
 void SetSignalsOnBothDir(TileIndex tile, byte track);