diff --git a/vehicle/2.0/default/VehicleHal.h b/vehicle/2.0/default/VehicleHal.h
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+++ b/vehicle/2.0/default/VehicleHal.h
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+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef android_hardware_vehicle_V2_0_VehicleHal_H_
+#define android_hardware_vehicle_V2_0_VehicleHal_H_
+
+#include <android/hardware/vehicle/2.0/IVehicle.h>
+#include "vehicle_hal_manager/VehicleObjectPool.h"
+
+
+namespace android {
+namespace hardware {
+namespace vehicle {
+namespace V2_0 {
+
+/**
+ * This is a low-level vehicle hal interface that should be implemented by
+ * Vendor.
+ */
+class VehicleHal {
+public:
+    using VehiclePropValuePtr = recyclable_ptr<VehiclePropValue>;
+
+    using HalEventFunction = std::function<void(VehiclePropValuePtr)>;
+    using HalErrorFunction = std::function<void(
+            VehicleProperty property,
+            status_t errorCode,
+            VehiclePropertyOperation operation)>;
+
+    virtual ~VehicleHal() {}
+
+    virtual std::vector<VehiclePropConfig> listProperties() = 0;
+    virtual VehiclePropValuePtr get(VehicleProperty property,
+                                    int32_t areaId,
+                                    status_t* outStatus) = 0;
+
+    virtual status_t set(const VehiclePropValue& propValue) = 0;
+
+    /**
+     * Subscribe to HAL property events. This method might be called multiple
+     * times for the same vehicle property to update subscribed areas or sample
+     * rate.
+     *
+     * @param property to subscribe
+     * @param areas a bitwise vehicle areas or 0 for all supported areas
+     * @param sampleRate sample rate in Hz for properties that support sample
+     *                   rate, e.g. for properties with
+     *                   VehiclePropertyChangeMode::CONTINUOUS
+     */
+    virtual status_t subscribe(VehicleProperty property,
+                               int32_t areas,
+                               float sampleRate) = 0;
+
+    /**
+     * Unsubscribe from HAL events for given property
+     *
+     * @param property vehicle property to unsubscribe
+     */
+    virtual status_t unsubscribe(VehicleProperty property) = 0;
+
+    /**
+     * Override this method if you need to do one-time initialization.
+     */
+    virtual void onCreate() {}
+
+    void init(
+        VehiclePropValuePool* valueObjectPool,
+        const HalEventFunction& onHalEvent,
+        const HalErrorFunction& onHalError) {
+        mValuePool = valueObjectPool;
+        mOnHalEvent = onHalEvent;
+        mOnHalError = onHalError;
+
+        onCreate();
+    }
+
+    VehiclePropValuePool* getValuePool() {
+        return mValuePool;
+    }
+protected:
+    void doHalEvent(VehiclePropValuePtr v) {
+        mOnHalEvent(std::move(v));
+    }
+
+    void doHalError(VehicleProperty property,
+                    status_t errorCode,
+                    VehiclePropertyOperation operation) {
+        mOnHalError(property, errorCode, operation);
+    }
+
+private:
+    HalEventFunction mOnHalEvent;
+    HalErrorFunction mOnHalError;
+    VehiclePropValuePool* mValuePool;
+};
+
+}  // namespace V2_0
+}  // namespace vehicle
+}  // namespace hardware
+}  // namespace android
+
+#endif //android_hardware_vehicle_V2_0_VehicleHal_H_