diff --git a/src/saveload/train_speed_adaptation.cpp b/src/saveload/train_speed_adaptation.cpp
new file mode 100644
index 0000000000..21dfa39441
--- /dev/null
+++ b/src/saveload/train_speed_adaptation.cpp
@@ -0,0 +1,51 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file train_speed_adaptation.cpp Code handling saving and loading of data for train speed adaptation */
+
+#include "../stdafx.h"
+#include "../train_speed_adaptation.h"
+#include "saveload.h"
+
+using SignalSpeedType = std::pair<const SignalSpeedKey, SignalSpeedValue>;
+
+static const SaveLoad _train_speed_adaptation_map_desc[] = {
+	SLE_VAR(SignalSpeedType, first.signal_track,           SLE_UINT8),
+	SLE_VAR(SignalSpeedType, first.last_passing_train_dir, SLE_UINT8),
+	SLE_VAR(SignalSpeedType, second.train_speed,           SLE_UINT16),
+	SLE_VAR(SignalSpeedType, second.time_stamp,            SLE_UINT64),
+	SLE_END()
+};
+
+static void Load_TSAS()
+{
+	int index;
+	SignalSpeedType data;
+	while ((index = SlIterateArray()) != -1) {
+		const_cast<SignalSpeedKey &>(data.first).signal_tile = index;
+		SlObject(&data, _train_speed_adaptation_map_desc);
+		_signal_speeds.insert(data);
+	}
+}
+
+static void RealSave_TSAS(SignalSpeedType *data)
+{
+	SlObject(data, _train_speed_adaptation_map_desc);
+}
+
+static void Save_TSAS()
+{
+	for (auto &it : _signal_speeds) {
+		SlSetArrayIndex(it.first.signal_tile);
+		SignalSpeedType *data = &it;
+		SlAutolength((AutolengthProc*) RealSave_TSAS, data);
+	}
+}
+
+extern const ChunkHandler _train_speed_adaptation_chunk_handlers[] = {
+	{ 'TSAS', Save_TSAS, Load_TSAS, nullptr, nullptr, CH_SPARSE_ARRAY | CH_LAST},
+};