diff --git a/automotive/vehicle/aidl/generated_lib/cpp/AccessForVehicleProperty.h b/automotive/vehicle/aidl/generated_lib/cpp/AccessForVehicleProperty.h
index 84aef2e..2e5b0b6 100644
--- a/automotive/vehicle/aidl/generated_lib/cpp/AccessForVehicleProperty.h
+++ b/automotive/vehicle/aidl/generated_lib/cpp/AccessForVehicleProperty.h
@@ -276,6 +276,7 @@
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_SYSTEM_ENABLED, VehiclePropertyAccess::READ_WRITE},
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_STATE, VehiclePropertyAccess::READ},
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyAccess::READ_WRITE},
+        {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING, VehiclePropertyAccess::READ},
 };
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/aidl/generated_lib/cpp/ChangeModeForVehicleProperty.h b/automotive/vehicle/aidl/generated_lib/cpp/ChangeModeForVehicleProperty.h
index e259a4d..507a20b 100644
--- a/automotive/vehicle/aidl/generated_lib/cpp/ChangeModeForVehicleProperty.h
+++ b/automotive/vehicle/aidl/generated_lib/cpp/ChangeModeForVehicleProperty.h
@@ -276,6 +276,7 @@
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_SYSTEM_ENABLED, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_STATE, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyChangeMode::ON_CHANGE},
+        {VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING, VehiclePropertyChangeMode::ON_CHANGE},
 };
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/aidl/generated_lib/java/AccessForVehicleProperty.java b/automotive/vehicle/aidl/generated_lib/java/AccessForVehicleProperty.java
index 1d18560..792a528 100644
--- a/automotive/vehicle/aidl/generated_lib/java/AccessForVehicleProperty.java
+++ b/automotive/vehicle/aidl/generated_lib/java/AccessForVehicleProperty.java
@@ -267,7 +267,8 @@
         Map.entry(VehicleProperty.HANDS_ON_DETECTION_WARNING, VehiclePropertyAccess.READ),
         Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_SYSTEM_ENABLED, VehiclePropertyAccess.READ_WRITE),
         Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_STATE, VehiclePropertyAccess.READ),
-        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyAccess.READ_WRITE)
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyAccess.READ_WRITE),
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING, VehiclePropertyAccess.READ)
     );
 
 }
diff --git a/automotive/vehicle/aidl/generated_lib/java/ChangeModeForVehicleProperty.java b/automotive/vehicle/aidl/generated_lib/java/ChangeModeForVehicleProperty.java
index 6d0be78..6b88403 100644
--- a/automotive/vehicle/aidl/generated_lib/java/ChangeModeForVehicleProperty.java
+++ b/automotive/vehicle/aidl/generated_lib/java/ChangeModeForVehicleProperty.java
@@ -267,7 +267,8 @@
         Map.entry(VehicleProperty.HANDS_ON_DETECTION_WARNING, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_SYSTEM_ENABLED, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_STATE, VehiclePropertyChangeMode.ON_CHANGE),
-        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyChangeMode.ON_CHANGE)
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED, VehiclePropertyChangeMode.ON_CHANGE),
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING, VehiclePropertyChangeMode.ON_CHANGE)
     );
 
 }
diff --git a/automotive/vehicle/aidl/generated_lib/java/EnumForVehicleProperty.java b/automotive/vehicle/aidl/generated_lib/java/EnumForVehicleProperty.java
index 2e8e6fd..afc7073 100644
--- a/automotive/vehicle/aidl/generated_lib/java/EnumForVehicleProperty.java
+++ b/automotive/vehicle/aidl/generated_lib/java/EnumForVehicleProperty.java
@@ -94,7 +94,8 @@
         Map.entry(VehicleProperty.CRUISE_CONTROL_COMMAND, List.of(CruiseControlCommand.class)),
         Map.entry(VehicleProperty.HANDS_ON_DETECTION_DRIVER_STATE, List.of(HandsOnDetectionDriverState.class, ErrorState.class)),
         Map.entry(VehicleProperty.HANDS_ON_DETECTION_WARNING, List.of(HandsOnDetectionWarning.class, ErrorState.class)),
-        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_STATE, List.of(DriverDrowsinessAttentionState.class, ErrorState.class))
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_STATE, List.of(DriverDrowsinessAttentionState.class, ErrorState.class)),
+        Map.entry(VehicleProperty.DRIVER_DROWSINESS_ATTENTION_WARNING, List.of(DriverDrowsinessAttentionWarning.class, ErrorState.class))
     );
 
 }
diff --git a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp
index 1638f3c..8dd84b9 100644
--- a/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp
+++ b/automotive/vehicle/aidl/impl/default_config/JsonConfigLoader/src/JsonConfigLoader.cpp
@@ -42,6 +42,7 @@
 using ::aidl::android::hardware::automotive::vehicle::CruiseControlState;
 using ::aidl::android::hardware::automotive::vehicle::CruiseControlType;
 using ::aidl::android::hardware::automotive::vehicle::DriverDrowsinessAttentionState;
+using ::aidl::android::hardware::automotive::vehicle::DriverDrowsinessAttentionWarning;
 using ::aidl::android::hardware::automotive::vehicle::EmergencyLaneKeepAssistState;
 using ::aidl::android::hardware::automotive::vehicle::ErrorState;
 using ::aidl::android::hardware::automotive::vehicle::EvConnectorType;
@@ -255,6 +256,8 @@
             std::make_unique<ConstantParser<HandsOnDetectionWarning>>();
     mConstantParsersByType["DriverDrowsinessAttentionState"] =
             std::make_unique<ConstantParser<DriverDrowsinessAttentionState>>();
+    mConstantParsersByType["DriverDrowsinessAttentionWarning"] =
+            std::make_unique<ConstantParser<DriverDrowsinessAttentionWarning>>();
     mConstantParsersByType["ErrorState"] = std::make_unique<ConstantParser<ErrorState>>();
     mConstantParsersByType["AutomaticEmergencyBrakingState"] =
             std::make_unique<ConstantParser<AutomaticEmergencyBrakingState>>();
diff --git a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
index af3d34e..fe62575 100644
--- a/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
+++ b/automotive/vehicle/aidl/impl/default_config/config/DefaultProperties.json
@@ -3587,6 +3587,24 @@
             }
         },
         {
+            "property": "VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING",
+            "defaultValue": {
+                "int32Values": [
+                    "DriverDrowsinessAttentionWarning::NO_WARNING"
+                ]
+            },
+            "areas": [
+                {
+                    "areaId": 0,
+                    "supportedEnumValues": [
+                        "ErrorState::NOT_AVAILABLE_DISABLED",
+                        "DriverDrowsinessAttentionWarning::NO_WARNING",
+                        "DriverDrowsinessAttentionWarning::WARNING"
+                    ]
+                }
+            ]
+        },
+        {
             "property": "VehicleProperty::INITIAL_USER_INFO"
         },
         {
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
index 7a3be08..97ef5ae 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -54,6 +54,7 @@
 using ::aidl::android::hardware::automotive::vehicle::CruiseControlCommand;
 using ::aidl::android::hardware::automotive::vehicle::CruiseControlType;
 using ::aidl::android::hardware::automotive::vehicle::DriverDrowsinessAttentionState;
+using ::aidl::android::hardware::automotive::vehicle::DriverDrowsinessAttentionWarning;
 using ::aidl::android::hardware::automotive::vehicle::ErrorState;
 using ::aidl::android::hardware::automotive::vehicle::GetValueRequest;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResult;
@@ -200,6 +201,13 @@
                         toInt(VehicleProperty::DRIVER_DROWSINESS_ATTENTION_STATE),
                 },
         },
+        // Driver Drowsiness and Attention Warning
+        {
+                toInt(VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED),
+                {
+                        toInt(VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING),
+                },
+        },
 };
 }  // namespace
 
diff --git a/automotive/vehicle/aidl/impl/utils/common/include/VehicleHalTypes.h b/automotive/vehicle/aidl/impl/utils/common/include/VehicleHalTypes.h
index d4180a3..829e4e3 100644
--- a/automotive/vehicle/aidl/impl/utils/common/include/VehicleHalTypes.h
+++ b/automotive/vehicle/aidl/impl/utils/common/include/VehicleHalTypes.h
@@ -25,6 +25,7 @@
 #include <aidl/android/hardware/automotive/vehicle/DiagnosticFloatSensorIndex.h>
 #include <aidl/android/hardware/automotive/vehicle/DiagnosticIntegerSensorIndex.h>
 #include <aidl/android/hardware/automotive/vehicle/DriverDrowsinessAttentionState.h>
+#include <aidl/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.h>
 #include <aidl/android/hardware/automotive/vehicle/EmergencyLaneKeepAssistState.h>
 #include <aidl/android/hardware/automotive/vehicle/ErrorState.h>
 #include <aidl/android/hardware/automotive/vehicle/EvConnectorType.h>
diff --git a/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl
new file mode 100644
index 0000000..dbf2364
--- /dev/null
+++ b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.automotive.vehicle;
+@Backing(type="int") @VintfStability
+enum DriverDrowsinessAttentionWarning {
+  OTHER = 0,
+  NO_WARNING = 1,
+  WARNING = 2,
+}
diff --git a/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
index 4a82d81..e84e5c7 100644
--- a/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -274,4 +274,5 @@
   DRIVER_DROWSINESS_ATTENTION_SYSTEM_ENABLED = (((0x1019 + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.BOOLEAN) /* 287313945 */,
   DRIVER_DROWSINESS_ATTENTION_STATE = (((0x101A + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32) /* 289411098 */,
   DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED = (((0x101B + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.BOOLEAN) /* 287313947 */,
+  DRIVER_DROWSINESS_ATTENTION_WARNING = (((0x101C + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32) /* 289411100 */,
 }
diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl
new file mode 100644
index 0000000..53b66b9
--- /dev/null
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/DriverDrowsinessAttentionWarning.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+package android.hardware.automotive.vehicle;
+
+/**
+ * Used to enumerate the current warning state of the driver drowsiness and attention monitoring
+ * system.
+ */
+@VintfStability
+@Backing(type="int")
+enum DriverDrowsinessAttentionWarning {
+    /**
+     * This state is used as an alternative for any DriverDrowsinessAttentionWarning value that is
+     * defined in the platform. Ideally, implementations of
+     * VehicleProperty#DRIVER_DROWSINESS_ATTENTION_WARNING should not use this state. The framework
+     * can use this field to remain backwards compatible if DriverDrowsinessAttentionWarning is
+     * extended to include additional states.
+     */
+    OTHER = 0,
+    /**
+     * When the driver drowsiness and attention warning is enabled, and the driver's current
+     * drowsiness and attention level does not warrant the system to send a warning.
+     */
+    NO_WARNING = 1,
+    /**
+     * When the driver drowsiness and attention warning is enabled, and the system is warning the
+     * driver based on its assessment of the driver's current drowsiness and attention level.
+     */
+    WARNING = 2,
+}
diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
index ce311fb..b69641a 100644
--- a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -5159,6 +5159,27 @@
     DRIVER_DROWSINESS_ATTENTION_WARNING_ENABLED =
             0x101B + VehiclePropertyGroup.SYSTEM + VehicleArea.GLOBAL + VehiclePropertyType.BOOLEAN,
 
+    /**
+     * Driver drowsiness and attention warning.
+     *
+     * Returns whether a warning is being sent to the driver for being drowsy or not attentive.
+     *
+     * Generally, this property should return a valid state defined in
+     * DriverDrowsinessAttentionWarning or ErrorState. For example, if the feature is not available
+     * due to some temporary state, that information should be conveyed through an ErrorState.
+     *
+     * For the global area ID (0), the VehicleAreaConfig#supportedEnumValues array must be defined
+     * unless all states of both DriverDrowsinessAttentionWarning (including OTHER, which is not
+     * recommended) and ErrorState are supported.
+     *
+     * @change_mode VehiclePropertyChangeMode.ON_CHANGE
+     * @access VehiclePropertyAccess.READ
+     * @data_enum DriverDrowsinessAttentionWarning
+     * @data_enum ErrorState
+     */
+    DRIVER_DROWSINESS_ATTENTION_WARNING =
+            0x101C + VehiclePropertyGroup.SYSTEM + VehicleArea.GLOBAL + VehiclePropertyType.INT32,
+
     /***************************************************************************
      * End of ADAS Properties
      **************************************************************************/
diff --git a/automotive/vehicle/vts/src/VtsHalAutomotiveVehicle_TargetTest.cpp b/automotive/vehicle/vts/src/VtsHalAutomotiveVehicle_TargetTest.cpp
index 8aed881..0a62801 100644
--- a/automotive/vehicle/vts/src/VtsHalAutomotiveVehicle_TargetTest.cpp
+++ b/automotive/vehicle/vts/src/VtsHalAutomotiveVehicle_TargetTest.cpp
@@ -639,6 +639,12 @@
                    VehiclePropertyGroup::SYSTEM, VehicleArea::GLOBAL, VehiclePropertyType::BOOLEAN);
 }
 
+TEST_P(VtsHalAutomotiveVehicleTargetTest, verifyDriverDrowsinessAttentionWarningConfig) {
+    verifyProperty(VehicleProperty::DRIVER_DROWSINESS_ATTENTION_WARNING,
+                   VehiclePropertyAccess::READ, VehiclePropertyChangeMode::ON_CHANGE,
+                   VehiclePropertyGroup::SYSTEM, VehicleArea::GLOBAL, VehiclePropertyType::INT32);
+}
+
 TEST_P(VtsHalAutomotiveVehicleTargetTest, verifyEvBrakeRegenerationLevelConfig) {
     verifyProperty(VehicleProperty::EV_BRAKE_REGENERATION_LEVEL,
                    VehiclePropertyAccess::READ_WRITE, VehiclePropertyChangeMode::ON_CHANGE,