/** Struct used for GetVehicleTunnelBridge() */

struct TunnelBridgeInfo {

	TileIndex tile;                      ///< tile

};

/** Procedure called for every vehicle found in tunnel/bridge in the hash map */

static void *GetVehicleTunnelBridgeProc(Vehicle *v, void *data)

{

	TunnelBridgeInfo *tbi = (TunnelBridgeInfo*)data;

	if (v->tile != tbi->tile || (v->type != VEH_TRAIN && v->type != VEH_ROAD)) return NULL;

	_error_message = VehicleInTheWayErrMsg(v);

	return v;

}

/**

 * Finds vehicle in tunnel / bridge

 * @param tile first end

 * @param endtile second end

 * @return pointer to vehicle found

 */

Vehicle *GetVehicleTunnelBridge(TileIndex tile, TileIndex endtile)

{

	TunnelBridgeInfo tbi = {tile};

	Vehicle *v = (Vehicle*)VehicleFromPos(tile, &tbi, &GetVehicleTunnelBridgeProc);

	if (v != NULL) return v;

	tbi.tile = endtile;

	return (Vehicle*)VehicleFromPos(endtile, &tbi, &GetVehicleTunnelBridgeProc);

}