This term is part of the following categories: safety, technology, and activity/ process.
Version 5.0, release date: April 2023.
Definition: process by which the full function of the dynamic driving task is delivered when a driving automation system or systems cease to operate.
Note 1: fallback may be required due to mechanical breakdown, driving automation system failure, departure from the operational design domain for the driving automation system or failure of the human driver to respond to a request to resume the dynamic driving task.
Note 2: fallback performance in automated vehicles is delivered by the automated driving system; for vehicles with less capable driving automation systems, the human driver delivers some or all of the fallback process.
Note 3: if a trip cannot be completed, fallback requires a minimal risk manoeuvre to achieve a minimal risk condition. These may be delivered by the human driver or automated driving systems, depending on the capabilities of the vehicle and extent of any system failure.
Previous version:
Version 4.0, release date: March 2022.
Definition: process by which the full function of the dynamic driving task is delivered when a driving automation system or systems cease to operate.
Note 1: fallback might be required due to mechanical breakdown, driving automation system failure, departure from the operational design domain for the driving automation system, or failure of the human driver to respond to a request to resume the full function of the dynamic driving task.
Note 2: fallback performance in automated vehicles is delivered by the automated driving system; for vehicles with less capable driving automation systems, the human driver delivers some or all of the fallback process.
Note 3: if a trip cannot be completed, fallback requires a minimal risk manoeuvre to achieve a minimal risk condition. These could be delivered by the human driver or automated driving systems, depending on the capabilities of the vehicle and extent of any system failure.
Version: 3.0, release date: October 2020.
Definition: process by which the full function of the dynamic driving task is delivered when a driving automation system or systems cease to operate.
Note 1: fallback may be required due to mechanical breakdown, driving automation system failure, departure from the operational design domain for the driving automation system or failure of the human driver to respond to a request to resume the full function of the dynamic driving task.
Note 2: fallback performance in automated vehicles is delivered by the automated driving system; for vehicles with less capable driving automation systems, the human driver delivers some or all of the fallback process.
Note 3: if a trip cannot be completed, fallback requires a minimal risk manoeuvre to achieve a minimal risk condition. These may be delivered by the human driver or automated driving systems, depending on the capabilities of the vehicle and extent of any system failure.
Version: 2.0, release date: June 2020.
Definition: process by which the full function of the dynamic driving task is delivered when a driving automation system or systems cease to operate.
Note 1: fallback may be required due to mechanical breakdown, driving automation system failure, departure from the operational design domain for the driving automation system or failure of the human driver to respond to a request to resume the full function of the dynamic driving task.
Note 2: fallback performance in automated vehicles is delivered by the automated driving system; for vehicles with less capable driving automation systems, the human driver delivers some or all of the fallback process.
Note 3: if a trip cannot be completed, fallback requires a minimal risk manoeuvre to achieve a minimal risk condition. These may be delivered by the human driver or automated driving systems, depending on the capabilities of the vehicle and extent of any system failure.
