For decades, self-driving cars seemed like something confined to science fiction. Today, advances in Artificial Intelligence (AI) and vehicle technology mean autonomous vehicles are becoming a realistic prospect on UK roads.
In 2024, the UK Government took a significant step towards that future when the Automated Vehicles Act 2024 received Royal Assent. The legislation creates the legal framework for the introduction and regulation of self-driving vehicles across Great Britain.
However, while the Act is now law, many of its key provisions have not yet been brought fully into force. Further regulations, consultations and implementation measures are still required before the new regime becomes operational in practice, with wider implementation expected over the coming years.
As autonomous vehicle technology continues to develop, an important legal question arises:
If a Self-Driving Car Causes an Accident, Who Is Responsible?
Traditionally, road traffic claims have focused on driver error.
When a collision occurs, the key questions are often straightforward:
- Was the driver negligent?
- Did they fail to keep a proper lookout?
- Did they breach the Highway Code?
But autonomous vehicles have the potential to change that landscape dramatically.
If a vehicle is genuinely driving itself, responsibility may no longer rest solely with the person sitting behind the wheel.
What Is a Self-Driving Vehicle?
Under the Automated Vehicles Act 2024, a vehicle must satisfy a “self-driving test” before it can be authorised for automated use. Broadly speaking, this means it must be capable of travelling autonomously, safely and legally without being monitored by an individual ready to intervene immediately.
This is fundamentally different from many of the driver assistance features already available in modern vehicles, including:
- Adaptive cruise control
- Lane-keeping assistance
- Automatic emergency braking
- Parking assistance systems
These technologies assist drivers, but they do not replace them.
The new legislation is intended to regulate vehicles capable of significantly greater levels of autonomous operation.
This Isn’t Science Fiction – It’s Already Happening
While fully authorised self-driving vehicles are not yet operating under the UK’s new regulatory framework, autonomous taxis are already carrying passengers in parts of the United States.
Waymo, a subsidiary of Google’s parent company Alphabet, currently operates commercial driverless taxi services in cities including Phoenix, San Francisco and Los Angeles. Members of the public can book journeys in vehicles operating without a human driver behind the wheel.
The robotaxi market continues to expand, with autonomous ride-hailing services now operating or being introduced across a growing number of American cities. Las Vegas has also emerged as a significant testing and deployment location, with companies including Zoox operating driverless vehicles in the city.
The significance of these developments is that the debate is no longer theoretical.
Questions surrounding liability, insurance and accountability are already becoming practical issues for courts, insurers, manufacturers and lawyers in jurisdictions where autonomous vehicles are operating on public roads.
As the UK moves closer to introducing self-driving vehicles under the Automated Vehicles Act 2024, many of the legal questions already emerging in the United States are likely to become increasingly relevant here.
Why Has New Legislation Been Needed?
The law has traditionally assumed that a human being is responsible for driving a vehicle.
Autonomous technology challenges that assumption.
If an accident occurs because a self-driving system misinterprets road markings, fails to identify a hazard or makes an incorrect driving decision, establishing fault becomes more complicated.
Recognising these challenges, the UK Government introduced the Automated Vehicles Act 2024 to create a regulatory framework that seeks to support innovation while maintaining road safety. The legislation also aims to clarify accountability where self-driving technology is involved in incidents or traffic infractions.
A New Concept: The Authorised Self-Driving Entity
One of the most significant features of the legislation is the introduction of the Authorised Self-Driving Entity (ASDE).
An ASDE will generally be the organisation responsible for ensuring that an authorised automated vehicle continues to satisfy regulatory requirements. This is likely to be the vehicle developer, manufacturer or software provider rather than the individual using the vehicle.
This represents a potentially major shift in how responsibility may be viewed when accidents occur.
Historically, liability in road traffic claims has focused heavily on driver conduct. In an autonomous environment, attention may increasingly turn towards:
- Manufacturers and vehicle developers
- Software and AI providers
- Fleet operators
- Maintenance and servicing companies
The legal landscape is evolving.
Could Self-Driving Cars Reduce Road Accidents?
Supporters of autonomous vehicle technology point to its potential safety benefits.
The Government has highlighted that human error contributes to the vast majority of road traffic collisions and argues that self-driving technology has the potential to reduce incidents caused by distraction, fatigue, impairment and inattention.
Potential benefits may include:
- Reduced driver fatigue
- Elimination of drink-driving risks during automated operation
- Faster reaction times
- More consistent decision-making
- Improved traffic flow
If the technology performs as intended, there is reason to believe autonomous vehicles could make our roads safer.
However, no technology is infallible.
What Happens When Technology Gets It Wrong
The introduction of AI into driving creates new risks alongside new opportunities.
For example:
- A vehicle may fail to detect a pedestrian
- A sensor could malfunction
- Software may misinterpret road conditions
- A system update could introduce an unexpected fault
- Cybersecurity vulnerabilities could emerge
These scenarios raise questions that lawyers, insurers and courts may increasingly face in the years ahead.
Unlike traditional accidents, responsibility may involve multiple parties and highly technical evidence.
Determining whether the cause was driver error, software failure, equipment malfunction or inadequate maintenance may become a crucial issue in future claims.
What Will This Mean for Personal Injury Claims?
For injured road users, the key issue remains the same: obtaining compensation where someone else is legally responsible for the harm suffered.
Although the technology may change, the fundamental principles of personal injury law remain focused on accountability and compensation.
Future claims may involve allegations that:
- A self-driving system malfunctioned
- Vehicle software made an unsafe decision
- A manufacturer supplied a defective vehicle
- Safety-critical sensors failed
- An operator failed to maintain or update the vehicle properly
As the courts begin dealing with these issues, new case law will inevitably develop.
AI Is Changing the Roads – But Not the Need for Accountability
The arrival of self-driving vehicles represents one of the most significant developments in transport law for generations.
While the Automated Vehicles Act 2024 has established the legal framework for this new technology, much of that framework is still being implemented through secondary legislation and regulatory guidance. Fully authorised self-driving vehicles are therefore not yet operating under the completed regime envisaged by Parliament.
For many people, self-driving cars still sound futuristic. In reality, passengers are already using autonomous taxi services in several major US cities.
The question is no longer whether the technology will arrive in the UK.
The question is how the law will respond when autonomous vehicles become part of everyday life.
Whether responsibility for automated vehicles ultimately lies with a driver, a manufacturer, a software developer or another organisation, the law will continue to evolve to ensure that those injured as a result of another party’s negligence have access to justice.
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