diff --git a/include/updater/csv_file_parser.hpp b/include/updater/csv_file_parser.hpp
index a0c987d93..8ab3f3dfb 100644
--- a/include/updater/csv_file_parser.hpp
+++ b/include/updater/csv_file_parser.hpp
@@ -1,5 +1,6 @@
 #ifndef OSRM_UPDATER_CSV_FILE_PARSER_HPP
 #define OSRM_UPDATER_CSV_FILE_PARSER_HPP
+#include "file_parser.hpp"
 #include <parquet/arrow/reader.h>
 #include <parquet/stream_reader.h>
 #include <arrow/io/file.h>
@@ -33,77 +34,20 @@ namespace updater
 // Key and Value structures must be a model of Random Access Sequence.
 // Also the Value structure must have source member that will be filled
 // with the corresponding file index in the CSV filenames vector.
-template <typename Key, typename Value> struct CSVFilesParser
+template <typename Key, typename Value> struct CSVFilesParser : public FilesParser<Key, Value>
 {
     using Iterator = boost::iostreams::mapped_file_source::iterator;
     using KeyRule = boost::spirit::qi::rule<Iterator, Key()>;
     using ValueRule = boost::spirit::qi::rule<Iterator, Value()>;
 
-    CSVFilesParser(std::size_t start_index, const KeyRule &key_rule, const ValueRule &value_rule)
-        : start_index(start_index), key_rule(key_rule), value_rule(value_rule)
+    CSVFilesParser(const KeyRule &key_rule, const ValueRule &value_rule)
+        : key_rule(key_rule), value_rule(value_rule)
     {
     }
 
-    // Operator returns a lambda function that maps input Key to boost::optional<Value>.
-    auto operator()(const std::vector<std::string> &csv_filenames) const
-    {
-
-std::shared_ptr<arrow::io::ReadableFile> infile;
-
-   PARQUET_ASSIGN_OR_THROW(
-      infile,
-      arrow::io::ReadableFile::Open("test.parquet"));
-
-   parquet::StreamReader os{parquet::ParquetFileReader::Open(infile)};
-    (void)os;
-
-        try
-        {
-            tbb::spin_mutex mutex;
-            std::vector<std::pair<Key, Value>> lookup;
-            tbb::parallel_for(std::size_t{0}, csv_filenames.size(), [&](const std::size_t idx) {
-                auto local = ParseCSVFile(csv_filenames[idx], start_index + idx);
-
-                { // Merge local CSV results into a flat global vector
-                    tbb::spin_mutex::scoped_lock _{mutex};
-                    lookup.insert(end(lookup),
-                                  std::make_move_iterator(begin(local)),
-                                  std::make_move_iterator(end(local)));
-                }
-            });
-
-            // With flattened map-ish view of all the files, make a stable sort on key and source
-            // and unique them on key to keep only the value with the largest file index
-            // and the largest line number in a file.
-            // The operands order is swapped to make descending ordering on (key, source)
-            tbb::parallel_sort(begin(lookup), end(lookup), [](const auto &lhs, const auto &rhs) {
-                return std::tie(rhs.first, rhs.second.source) <
-                       std::tie(lhs.first, lhs.second.source);
-            });
-
-            // Unique only on key to take the source precedence into account and remove duplicates.
-            const auto it =
-                std::unique(begin(lookup), end(lookup), [](const auto &lhs, const auto &rhs) {
-                    return lhs.first == rhs.first;
-                });
-            lookup.erase(it, end(lookup));
-
-            util::Log() << "In total loaded " << csv_filenames.size() << " file(s) with a total of "
-                        << lookup.size() << " unique values";
-
-            return LookupTable<Key, Value>{lookup};
-        }
-        catch (const std::exception &e)
-        // TBB should capture to std::exception_ptr and automatically rethrow in this thread.
-        // https://software.intel.com/en-us/node/506317
-        {
-            throw util::exception(e.what() + SOURCE_REF);
-        }
-    }
-
   private:
     // Parse a single CSV file and return result as a vector<Key, Value>
-    auto ParseCSVFile(const std::string &filename, std::size_t file_id) const
+    std::vector<std::pair<Key, Value>> ParseFile(const std::string &filename, std::size_t file_id) const final
     {
         namespace qi = boost::spirit::qi;
 
@@ -146,8 +90,7 @@ std::shared_ptr<arrow::io::ReadableFile> infile;
             throw util::exception(message.str() + SOURCE_REF);
         }
     }
-
-    const std::size_t start_index;
+  
     const KeyRule key_rule;
     const ValueRule value_rule;
 };
diff --git a/include/updater/file_parser.hpp b/include/updater/file_parser.hpp
new file mode 100644
index 000000000..09f61a372
--- /dev/null
+++ b/include/updater/file_parser.hpp
@@ -0,0 +1,106 @@
+#ifndef OSRM_UPDATER_FILE_PARSER_HPP
+#define OSRM_UPDATER_FILE_PARSER_HPP
+#include <parquet/arrow/reader.h>
+#include <parquet/stream_reader.h>
+#include <arrow/io/file.h>
+
+#include "updater/source.hpp"
+
+#include "util/exception.hpp"
+#include "util/exception_utils.hpp"
+#include "util/log.hpp"
+
+#include <tbb/parallel_for.h>
+#include <tbb/parallel_sort.h>
+#include <tbb/spin_mutex.h>
+
+#include <boost/exception/diagnostic_information.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/iostreams/device/mapped_file.hpp>
+#include <boost/spirit/include/phoenix.hpp>
+#include <boost/spirit/include/qi.hpp>
+
+#include <exception>
+#include <stdexcept>
+#include <vector>
+
+namespace osrm
+{
+namespace updater
+{
+
+// Functor to parse a list of CSV files using "key,value,comment" grammar.
+// Key and Value structures must be a model of Random Access Sequence.
+// Also the Value structure must have source member that will be filled
+// with the corresponding file index in the CSV filenames vector.
+template <typename Key, typename Value> struct FilesParser
+{
+
+    virtual ~FilesParser() = default;
+
+    // Operator returns a lambda function that maps input Key to boost::optional<Value>.
+    auto operator()(const std::vector<std::string> &csv_filenames) const
+    {
+
+// std::shared_ptr<arrow::io::ReadableFile> infile;
+
+//    PARQUET_ASSIGN_OR_THROW(
+//       infile,
+//       arrow::io::ReadableFile::Open("test.parquet"));
+
+//    parquet::StreamReader os{parquet::ParquetFileReader::Open(infile)};
+//     (void)os;
+
+        try
+        {
+            tbb::spin_mutex mutex;
+            std::vector<std::pair<Key, Value>> lookup;
+            tbb::parallel_for(std::size_t{0}, csv_filenames.size(), [&](const std::size_t idx) {
+                // TODO: do we need this `1 + ` here?
+                auto local = ParseFile(csv_filenames[idx], 1 + idx);
+
+                { // Merge local CSV results into a flat global vector
+                    tbb::spin_mutex::scoped_lock _{mutex};
+                    lookup.insert(end(lookup),
+                                  std::make_move_iterator(begin(local)),
+                                  std::make_move_iterator(end(local)));
+                }
+            });
+
+            // With flattened map-ish view of all the files, make a stable sort on key and source
+            // and unique them on key to keep only the value with the largest file index
+            // and the largest line number in a file.
+            // The operands order is swapped to make descending ordering on (key, source)
+            tbb::parallel_sort(begin(lookup), end(lookup), [](const auto &lhs, const auto &rhs) {
+                return std::tie(rhs.first, rhs.second.source) <
+                       std::tie(lhs.first, lhs.second.source);
+            });
+
+            // Unique only on key to take the source precedence into account and remove duplicates.
+            const auto it =
+                std::unique(begin(lookup), end(lookup), [](const auto &lhs, const auto &rhs) {
+                    return lhs.first == rhs.first;
+                });
+            lookup.erase(it, end(lookup));
+
+            util::Log() << "In total loaded " << csv_filenames.size() << " file(s) with a total of "
+                        << lookup.size() << " unique values";
+
+            return LookupTable<Key, Value>{lookup};
+        }
+        catch (const std::exception &e)
+        // TBB should capture to std::exception_ptr and automatically rethrow in this thread.
+        // https://software.intel.com/en-us/node/506317
+        {
+            throw util::exception(e.what() + SOURCE_REF);
+        }
+    }
+
+  protected:
+    // Parse a single CSV file and return result as a vector<Key, Value>
+    virtual std::vector<std::pair<Key, Value>> ParseFile(const std::string &filename, std::size_t file_id) const;
+};
+} // namespace updater
+} // namespace osrm
+
+#endif
diff --git a/include/updater/parquet_file_parser.hpp b/include/updater/parquet_file_parser.hpp
new file mode 100644
index 000000000..ce52d34c4
--- /dev/null
+++ b/include/updater/parquet_file_parser.hpp
@@ -0,0 +1,100 @@
+#ifndef OSRM_UPDATER_PARQUET_FILE_PARSER_HPP
+#define OSRM_UPDATER_PARQUET_FILE_PARSER_HPP
+#include "file_parser.hpp"
+#include <optional>
+#include <parquet/arrow/reader.h>
+#include <parquet/stream_reader.h>
+#include <arrow/io/file.h>
+
+#include "updater/source.hpp"
+
+#include "util/exception.hpp"
+#include "util/exception_utils.hpp"
+#include "util/log.hpp"
+
+#include <parquet/stream_writer.h>
+#include <tbb/parallel_for.h>
+#include <tbb/parallel_sort.h>
+#include <tbb/spin_mutex.h>
+
+#include <exception>
+#include <stdexcept>
+#include <vector>
+
+namespace osrm
+{
+namespace updater
+{
+
+// Functor to parse a list of CSV files using "key,value,comment" grammar.
+// Key and Value structures must be a model of Random Access Sequence.
+// Also the Value structure must have source member that will be filled
+// with the corresponding file index in the CSV filenames vector.
+template <typename Key, typename Value> struct ParquetFilesParser : public FilesParser<Key, Value>
+{
+  private:
+    // Parse a single CSV file and return result as a vector<Key, Value>
+    std::vector<std::pair<Key, Value>> ParseFile(const std::string &filename, std::size_t file_id) const final
+    {
+        // TODO: error handling
+        std::shared_ptr<arrow::io::ReadableFile> infile;
+
+        PARQUET_ASSIGN_OR_THROW(
+            infile,
+            arrow::io::ReadableFile::Open(filename));
+
+        parquet::StreamReader os{parquet::ParquetFileReader::Open(infile)};
+
+        std::vector<std::pair<Key, Value>> result;
+        while ( !os.eof() )
+        {
+            result.emplace_back(ReadKey(os), ReadValue(os, file_id));
+      // ...
+        }
+        return result;
+//     (void)os;
+
+    }
+
+    Key ReadKey(parquet::StreamReader &os) const
+    {
+        Key key;
+        ReadKey(os, key);
+        return key;
+    }
+
+    Value ReadValue(parquet::StreamReader &os, std::size_t file_id) const
+    {
+        Value value;
+        ReadValue(os, value);
+        value.source = file_id;
+        return value;
+    }
+
+    void ReadKey(parquet::StreamReader &os, Turn& turn) const {
+        os >> turn.from >> turn.via >> turn.to >> parquet::EndRow;
+    }
+
+    void ReadValue(parquet::StreamReader &os, PenaltySource& penalty_source) const {
+        os >> penalty_source.duration >> penalty_source.weight >> parquet::EndRow;
+    }
+
+    void ReadKey(parquet::StreamReader &os, Segment& segment) const {
+        os >> segment.from >> segment.to >> parquet::EndRow;
+    }
+
+    void ReadValue(parquet::StreamReader &os, SpeedSource& speed_source) const {
+        std::optional<double> rate;
+        os >> speed_source.speed >> rate >> parquet::EndRow;
+        // TODO: boost::optional
+        if (rate) {
+            speed_source.rate = *rate;
+        }
+       // os >> turn.weight >> turn.duration >> turn.pre_turn_bearing >> turn.post_turn_bearing >> turn.source >> parquet::EndRow;
+    }
+  
+};
+} // namespace updater
+} // namespace osrm
+
+#endif
diff --git a/src/updater/csv_source.cpp b/src/updater/csv_source.cpp
index fe13a7477..6469c5e3f 100644
--- a/src/updater/csv_source.cpp
+++ b/src/updater/csv_source.cpp
@@ -1,6 +1,7 @@
 #include "updater/csv_source.hpp"
 
 #include "updater/csv_file_parser.hpp"
+#include "updater/parquet_file_parser.hpp"
 
 #include <boost/fusion/adapted/std_pair.hpp>
 #include <boost/fusion/include/adapt_adt.hpp>
@@ -33,12 +34,9 @@ namespace csv
 {
 SegmentLookupTable readSegmentValues(const std::vector<std::string> &paths)
 {
-    static const auto value_if_blank = std::numeric_limits<double>::quiet_NaN();
-    const qi::real_parser<double, qi::ureal_policies<double>> unsigned_double;
-    CSVFilesParser<Segment, SpeedSource> parser(
-        1,
-        qi::ulong_long >> ',' >> qi::ulong_long,
-        unsigned_double >> -(',' >> (qi::double_ | qi::attr(value_if_blank))));
+    //static const auto value_if_blank = std::numeric_limits<double>::quiet_NaN();
+    //const qi::real_parser<double, qi::ureal_policies<double>> unsigned_double;
+    ParquetFilesParser<Segment, SpeedSource> parser;
 
     // Check consistency of keys in the result lookup table
     auto result = parser(paths);
@@ -57,10 +55,7 @@ SegmentLookupTable readSegmentValues(const std::vector<std::string> &paths)
 
 TurnLookupTable readTurnValues(const std::vector<std::string> &paths)
 {
-    CSVFilesParser<Turn, PenaltySource> parser(1,
-                                               qi::ulong_long >> ',' >> qi::ulong_long >> ',' >>
-                                                   qi::ulong_long,
-                                               qi::double_ >> -(',' >> qi::double_));
+    ParquetFilesParser<Turn, PenaltySource> parser;
     return parser(paths);
 }
 } // namespace csv