EDR IN EUROPE​

Event Data Recorders – Regulation, Development and Future

Event Data Recorders (EDRs) have become an important part of modern vehicle safety, accident investigation and road safety research. An EDR records selected vehicle data during the period immediately before, during and after a crash or other triggering event. Depending on the applicable regulation and vehicle category, this may include information such as vehicle speed, braking activity, restraint system status, safety system activation and other crash-related parameters.

For accident reconstruction, traditional sources of evidence are not always sufficient. Modern vehicles equipped with ABS, electronic stability control, advanced driver assistance systems and automated functions may leave fewer conventional traces, such as measurable skid marks. EDR data can therefore provide valuable additional information about the behaviour of the vehicle and its systems before and during a crash.

In Europe, the introduction of EDR has developed over many years. What started with research projects, expert initiatives and European studies has now resulted in mandatory requirements for passenger cars, vans, trucks and buses.

This page provides an overview of the current European framework, the applicable UNECE regulations, developments for heavy-duty vehicles, privacy and data-access issues, and the historical development of EDR in Europe.

​

1. CURRENT STATUS

EDR is now part of the European vehicle safety framework

​

The introduction of EDR in Europe is based primarily on the EU General Safety Regulation:

Regulation (EU) 2019/2144

This regulation introduced a broad range of new vehicle safety requirements. EDR is one of the mandatory safety technologies covered by this framework, together with systems such as advanced emergency braking, intelligent speed assistance, driver monitoring and other accident-avoidance technologies.

The detailed technical requirements for EDR differ according to vehicle category.

​

Passenger cars and light-duty vehicles

The requirements are based on:

• Regulation (EU) 2019/2144

• Commission Delegated Regulation (EU) 2022/545

• UN Regulation No. 160

For passenger cars and light-duty vehicles, the first set of mandatory EDR requirements was introduced for new vehicle types in July 2022 and subsequently for all newly registered vehicles in July 2024.

A further set of additional data elements applies progressively from July 2024 for new type approvals and from July 2026 for new registrations.

​

Trucks and buses

Heavy-duty vehicles follow a separate regulatory path.

The relevant framework includes:

• Regulation (EU) 2019/2144

• the applicable EU delegated legislation for heavy-duty vehicles

• UN Regulation No. 169

The implementation dates are:

• 7 January 2026 – requirements for new type approvals

• 7 January 2029 – requirements for new registrations

This means that EDR requirements for heavy-duty vehicles are now moving from the development phase into practical implementation.

​

2. WHAT IS AN EVENT DATA RECORDER?

​

An Event Data Recorder is a device or vehicle function that records selected dynamic vehicle data during a defined period immediately before, during, and, depending on the system, immediately after a crash event.

Typical information may include:

• vehicle speed

• braking activity

• accelerator position or driver input

• vehicle dynamics

• restraint system information

• airbag deployment

• safety system activation

• stability and traction-control information

• advanced driver assistance system status

• other crash-related parameters

​

The exact data elements depend on the applicable regulation and vehicle category.

An EDR is not intended to replace conventional accident investigation. Instead, it provides an additional technical source of information that can assist investigators in understanding the sequence of events.

EDR data can contribute to:

• accident reconstruction

• road safety research

• evaluation of vehicle safety systems

• analysis of crashes involving advanced driver assistance systems

• identification of vehicle behaviour before impact

• validation of accident hypotheses

• analysis of the interaction between driver, vehicle and environment

​

3. EDR FOR PASSENGER CARS AND LIGHT-DUTY VEHICLES

​

3.1 The European legal framework

The introduction of mandatory EDR requirements for passenger cars and light-duty vehicles is based on the General Safety Regulation, Regulation (EU) 2019/2144.

The detailed European requirements were subsequently established through:

Commission Delegated Regulation (EU) 2022/545

This regulation incorporates the technical framework developed at UNECE level through:

UN Regulation No. 160 – Event Data Recorder

The European framework therefore combines international technical harmonisation with specific European requirements concerning matters such as privacy, data access, cybersecurity and vehicle identification.

​

3.2 Implementation timetable

The implementation of EDR requirements for passenger cars and light-duty vehicles took place in several stages.

​

First group of data elements

7 July 2022

The first EDR requirements became applicable to new vehicle types requiring type approval.

7 July 2024

The requirements became applicable to newly registered vehicles.

​

Additional data elements

A second group of additional data elements was given a longer implementation period to allow manufacturers additional development time.

July 2024

Additional requirements became applicable to new type approvals.

7 July 2026

These additional requirements became applicable to newly registered vehicles.

The European EDR framework therefore developed in stages, beginning with a core set of data elements and later expanding the amount of information required to be recorded.

​

3.3 The 41 initial data elements

The first stage of the international EDR regulation was based on a set of 41 data elements.

This first step was developed within the UNECE EDR/DSSAD working process and was strongly influenced by existing international experience, including the US framework.

The objective was to establish an internationally harmonised foundation for crash-related data recording while allowing future expansion as vehicle technology developed.

​

3.4 The additional 23 data elements

A second group of 23 additional data elements was developed for later implementation.

These additional elements include information relating to, among other things:

• safety belt status

• rear passenger information

• tyre pressure monitoring systems

• longitudinal and lateral acceleration

• yaw rate

• traction control status

• advanced emergency braking status

• cruise control status

• adaptive cruise control status

• vulnerable road user protection systems

• far-side impact protection

• lane departure warning

• corrective steering functions

• emergency steering functions

• automatically commanded steering functions

• accident emergency call systems

The additional transition period was intended to give vehicle manufacturers sufficient time to incorporate the new requirements into vehicle systems.

​

4. PRIVACY, DATA PROTECTION AND VEHICLE IDENTIFICATION

Privacy has been one of the most important and sometimes controversial subjects during the development of European EDR regulation.

The European framework aims to ensure that EDR data can support accident research and analysis while protecting personal information and preventing unnecessary identification of individuals.

The original discussion included questions concerning:

• vehicle identification

• VIN information

• location data

• date and time information

• driver-related information

• access to recorded data

• cybersecurity

• protection against manipulation and misuse

A major discussion concerned the relationship between EDR data and the Vehicle Identification Number.

Earlier drafts of European legislation contained restrictions relating to the storage of the last four digits of the VIN. This created significant concerns among accident investigators and research organisations because a complete separation between EDR data and the specific vehicle could make technical interpretation more difficult.

At the same time, the European regulatory framework developed requirements intended to prevent EDR information from being used to identify a natural person.

The final European approach in Regulation (EU) 2022/545 therefore places strong emphasis on the principle that EDR data should not contain information that allows the recorded data to be linked directly to an identifiable natural person.

​

5. DATA ACCESS AND RETRIEVAL

An EDR is only useful when the recorded information can be retrieved and correctly interpreted.

For this reason, the European regulatory framework addresses not only the information to be recorded, but also issues relating to:

• access to the recorded information

• standardised interfaces

• retrieval after a crash

• vehicle identification

• information about installed safety systems

• cybersecurity

An EDR report should provide sufficient information to allow the relevant vehicle configuration and installed active safety systems to be identified.

This is important because the same vehicle model may be equipped with different safety systems, software versions or technical configurations.

The European framework also addresses situations in which normal access through a vehicle interface may not be possible after a serious crash.

The question of access to vehicle systems has become increasingly important as modern vehicles become more connected and protected by cybersecurity systems.

Developments concerning access to OBD systems, vehicle interfaces and cybersecurity will therefore remain relevant to the future practical use of EDR information.

​

6. CYBERSECURITY

Modern vehicles are increasingly dependent on electronic systems, software and communication networks.

As a result, the protection of recorded crash information has become an important regulatory issue.

The European EDR framework therefore operates alongside broader vehicle cybersecurity requirements.

EDR data must be protected against:

• manipulation

• unauthorised access

• misuse

• interference with the recorded information

The challenge is to achieve a balance between cybersecurity and legitimate access to technical data for accident investigation, research, repair and regulatory purposes.

This issue will become increasingly important as vehicles become more connected and automated.

​

7. UNECE AND THE DEVELOPMENT OF INTERNATIONAL EDR STANDARDS

The development of European EDR regulation has been closely connected with the work of UNECE and the World Forum for Harmonization of Vehicle Regulations, WP.29.

International harmonisation is important because vehicle manufacturers operate globally. A common technical framework reduces the need to develop completely separate vehicle systems for different markets.

The UNECE work on EDR initially focused on passenger cars and light-duty vehicles.

The result was the development of:

UN Regulation No. 160 – Event Data Recorder

The first stage included 41 data elements, followed by an additional group of 23 elements.

After the development of the passenger vehicle requirements, attention increasingly shifted towards heavy-duty vehicles.

​

8. EDR FOR TRUCKS AND BUSES

8.1 Heavy-duty vehicle development

The development of EDR requirements for trucks and buses followed a different timetable from passenger cars.

Heavy-duty vehicles have different technical systems, different operational characteristics and different accident scenarios.

The UNECE EDR/DSSAD working activities therefore expanded to address the specific requirements of:

• trucks

• tractor units

• buses

• coaches

• other heavy-duty vehicles

The result of this work was the development of:

UN Regulation No. 169

This regulation provides the technical basis for EDR requirements for heavy-duty vehicles.

​

8.2 European implementation

The European Union incorporated the heavy-duty EDR requirements into the General Safety Regulation framework.

The detailed requirements for trucks and buses are based on UN Regulation No. 169 rather than UN Regulation No. 160, which applies to passenger cars and light-duty vehicles.

The implementation dates are:

​

7 January 2026

New vehicle types requiring EU type approval must comply with the applicable EDR requirements.

7 January 2029

The requirements extend to newly registered vehicles within the relevant heavy-duty categories.

The relevant vehicle categories include:

• M2

• M3

• N2

• N3

This covers buses, coaches, trucks and heavy tractor units within the applicable European regulatory framework.

​

8.3 Privacy considerations for heavy-duty vehicles

The regulatory approach for heavy-duty EDR also takes privacy into account.

The mandatory EDR requirements are not intended to require the recording of:

• location information

• information directly identifying the driver

The purpose is to collect crash-related technical information while limiting the unnecessary collection of personal data.

​

9. EDR AND AUTOMATED DRIVING

The development of EDR is closely related to the development of automated and connected vehicles.

As vehicle automation increases, it becomes important to understand not only what the vehicle was doing before a crash, but also:

• which driving system was active

• when control was transferred between the driver and the vehicle

• what automated functions were operating

• whether the driver responded to a system request

• which safety systems were activated

For this reason, EDR development has been closely connected with work on:

DSSAD – Data Storage System for Automated Driving

DSSAD focuses on recording information relevant to automated driving systems and the interaction between the driver and the automated vehicle.

The development of EDR and DSSAD has taken place within the broader UNECE work on:

• automated vehicles

• connected vehicles

• cybersecurity

• software updates

• functional safety

• validation of automated driving systems

As vehicle technology continues to develop, the relationship between conventional crash data recording and automated driving data will become increasingly important.

​

10. WHY EDR DATA MATTERS

EDR information can contribute to a better understanding of accidents.

In-depth accident investigation traditionally considers the interaction between:

• the human

• the vehicle

• the environment

EDR information can provide additional technical evidence about the vehicle and its systems.

This can help researchers and investigators understand:

• how the vehicle was being operated

• what safety systems were active

• whether braking occurred

• how the vehicle responded before impact

• what occurred during the crash

• how restraint and protection systems performed

EDR data can therefore support both scientific research and individual accident investigation, subject to the applicable legal requirements for access and use.

The availability of reliable crash information also contributes to the continuing development and evaluation of vehicle safety technologies.

​

11. THE DEVELOPMENT OF EDR IN EUROPE

The European development of EDR did not begin with the General Safety Regulation.

The process started many years earlier through research projects, technical studies, accident investigation and cooperation between European organisations.

​

2003 – The VERONICA project

The European development of event recording systems began with the VERONICA project.

VERONICA stands for:

Vehicle Event Recording based on Intelligent Crash Assessment

The project was part of the European Road Safety Action Plan and focused on technical, legal and practical requirements for accident data recording.

VERONICA examined issues including:

• technical requirements

• legal requirements

• accident prevention

• data recording

• automatic crash notification

VERONICA I ran from 2003 to 2006.

VERONICA II followed from 2007 to 2009.

These projects created an important foundation for later European discussions on EDR.

​

2008 – Practical accident investigation

At the same time, practical experience with vehicle event data was increasing.

Training programmes in the United States contributed to the development of EDR and crash data retrieval expertise in Europe.

In 2008, an accident investigation in Rotterdam demonstrated the practical value of EDR information.

This experience helped increase awareness of the potential of electronic crash data in accident reconstruction.

​

2010 – Further European development

In 2010, further projects and initiatives were developed, including the CrashCube project (project leader Hans Bot)

The objective was to increase practical knowledge and technical expertise relating to crash data and accident investigation.

​

2011 – European Parliament and stakeholder activities

In 2011, EDR became increasingly visible within European political and regulatory discussions.

Representatives involved in the VERONICA projects, accident research and accident analysis developed proposals for the European Parliament and the TRAN Committee.

Consultations took place with Members of the European Parliament and other stakeholders.

The European Parliament subsequently called on the European Commission to consider a legislative proposal and a timetable for the phased introduction of event data recording.

The discussions recognised both the potential value of EDR for accident research and the importance of protecting personal data.

During this period, European police organisations, accident research organisations and other stakeholders also contributed to discussions concerning minimum user requirements.

​

2012 – Growing European support

Support for the further development of EDR in Europe came from a broad range of organisations involved in:

• accident investigation

• road safety

• police work

• vehicle research

• forensic investigation

• accident reconstruction

Discussions increasingly focused on how EDR could support European road safety policy and accident analysis.

​

2013–2014 – European Commission study

The European Commission commissioned a study on the benefits of installing Event Data Recorders.

The study was carried out by TRL.

The work examined:

• the potential road safety benefits

• technical feasibility

• costs and benefits

• privacy issues

• possible applications of EDR data

The study concluded that the introduction of EDR had a positive benefit-to-cost relationship.

The study also became an important reference during later discussions concerning privacy and vehicle identification.

​

2015 – Road safety becomes a stronger political priority

During this period, the European Commission continued to evaluate possible new vehicle safety measures.

EDR was increasingly considered as part of a broader strategy to improve road safety and better understand the causes of road accidents.

​

12. THE GENERAL SAFETY REGULATION

2018 – European Commission proposal

In 2018, the European Commission presented proposals for a new General Safety Regulation.

The proposal included a broad package of vehicle safety measures.

EDR was included as one of the technologies proposed for mandatory installation.

The proposal generated significant discussion concerning:

• the purpose of EDR data

• privacy

• VIN information

• data ownership

• accident research

• access to data

• the relationship between EDR and vehicle safety systems

Different stakeholders expressed different views on the scope and practical use of EDR information.

​

2019 – Political approval

In April 2019, the European Parliament approved the General Safety Regulation package.

EDR was included as a mandatory safety requirement for:

• passenger cars

• vans

• trucks

• buses

The final legislation became:

Regulation (EU) 2019/2144

The regulation created the legal basis for the mandatory introduction of EDR in Europe.

It also required the development of detailed technical and administrative rules.

​

13. THE UNECE EDR/DSSAD WORKING PROCESS

Following the adoption of the General Safety Regulation, international work accelerated.

UNECE working groups were tasked with developing harmonised technical requirements.

The work initially concentrated on passenger cars and light-duty vehicles.

A major objective was to create a practical international regulation that could provide a common basis for vehicle manufacturers and regulators.

The development process included:

• comparison of existing EDR systems

• consideration of US requirements

• proposals from industry

• contributions from European organisations

• input from other contracting parties

• discussions about privacy

• discussions about data survivability

• consideration of automated vehicle technologies

​

14. 2020 – FIRST STEP EDR

In 2020, the UNECE EDR/DSSAD working process focused on the development of a first internationally harmonised EDR regulation.

The approach was to establish a practical initial set of requirements rather than delay implementation while attempting to resolve every possible future requirement.

The framework became known as:

First Step EDR

The work resulted in:

• an initial set of 41 data elements

• a second group of 23 additional data elements

• a transition period for the additional requirements

The first step was partly based on existing international experience, including the US EDR framework, while expanding and adapting the requirements for a modern international regulatory environment.

​

15. 2021 – APPROVAL OF THE FIRST EDR REQUIREMENTS

In early 2021, the first EDR draft regulation developed by the UNECE EDR/DSSAD Informal Working Group was approved by GRSG.

The 41 initial data elements formed the basis of the first stage.

The additional 23 data elements were planned for later implementation.

This staged approach allowed international harmonisation to move forward while giving manufacturers additional time to develop and implement more complex requirements.

The work subsequently progressed towards approval within the UNECE WP.29 framework.

​

16. UN REGULATION NO. 160

The international work resulted in:

UN Regulation No. 160 – Event Data Recorder

This regulation became the technical basis for EDR requirements for passenger cars and light-duty vehicles.

The regulation addresses the recording and storage of specified crash-related data.

The European Union subsequently used this international framework as the basis for its own detailed EDR legislation.

​

17. 2021–2022 – PRIVACY AND THE EUROPEAN DELEGATED ACT

While UN Regulation No. 160 established the technical requirements, the European Union still needed detailed rules for implementation within the General Safety Regulation.

This created extensive discussion concerning:

• privacy

• personal data

• VIN information

• vehicle identification

• location information

• date and time information

• data retrieval

• cybersecurity

Early drafts created concerns that excessive anonymisation could make EDR data difficult to use in practical accident investigation.

Several road safety and stakeholder organisations argued that EDR data needed to remain sufficiently connected to the relevant vehicle and crash context to allow meaningful analysis.

The challenge was therefore to develop a system that protected privacy without eliminating the practical value of the recorded information.

​

18. 2022 – COMMISSION DELEGATED REGULATION (EU) 2022/545

In April 2022, the European regulatory process reached an important milestone.

The final European detailed regulation was published:

Commission Delegated Regulation (EU) 2022/545

This regulation supplemented Regulation (EU) 2019/2144 and established detailed requirements for EDR in passenger cars and light-duty vehicles.

Important elements include:

• requirements relating to recorded data

• privacy protection

• protection against direct identification of a natural person

• information concerning the specific vehicle configuration

• identification of active safety systems

• requirements relating to data retrieval

• restrictions concerning wireless access to EDR data

• cybersecurity requirements

The publication of this regulation marked the transition from years of discussion and development to practical implementation.

​

19. 2022–2024 – IMPLEMENTATION FOR PASSENGER VEHICLES

From July 2022, new vehicle types were required to comply with the initial EDR requirements.

From 7 July 2024, these requirements applied to newly registered passenger cars and light-duty vehicles.

At the same time, the additional group of EDR data elements began to apply to new type approvals.

The full implementation of these additional requirements for new registrations followed in 2026.

​

20. DEVELOPMENT OF EDR FOR HEAVY-DUTY VEHICLES

After the initial work on passenger cars, the UNECE EDR/DSSAD activities increasingly focused on heavy-duty vehicles.

This work considered the specific characteristics of trucks and buses.

Heavy-duty EDR development involved discussions concerning:

• relevant crash scenarios

• data elements

• vehicle dynamics

• braking systems

• safety systems

• data survivability

• international harmonisation

The work eventually resulted in the development of:

UN Regulation No. 169

This regulation provides the technical framework for EDR in heavy-duty vehicles.

​

21. EUROPEAN IMPLEMENTATION FOR TRUCKS AND BUSES

The European Union subsequently adopted detailed requirements for EDR in heavy-duty vehicles.

The heavy-duty requirements follow the same general European safety framework but refer to UN Regulation No. 169 rather than UN Regulation No. 160.

The implementation dates are:

DateRequirement

7 January 2026New type approvals

7 January 2029New registrations

This represents an important new phase in the European development of EDR.

EDR is no longer limited to passenger cars and vans. The technology is now becoming part of the regulatory framework for trucks, buses and other relevant heavy-duty vehicles.

​

22. EDR, MOTORCYCLES AND OTHER ROAD USERS

During the European development process, discussions also took place concerning the possible future extension of event data recording concepts to other categories.

Motorcycles have been identified as a category of interest because of their involvement in serious road accidents.

There have also been broader discussions concerning the relationship between accident data, vulnerable road users and modern vehicle safety systems.

At present, the regulatory framework described on this page primarily concerns passenger vehicles, light-duty vehicles and heavy-duty vehicles.

Future developments may expand the discussion to additional vehicle categories as technology and regulation continue to evolve.

​

23. INTERNATIONAL PERSPECTIVE

United States

The United States played an important role in the early development of automotive EDR.

The US regulatory framework developed through the work of the National Highway Traffic Safety Administration.

The US approach differs from the European approach.

Historically, the US regulation focused on defining minimum requirements for the information recorded by an EDR when such a system is installed.

The European framework, by contrast, introduced mandatory fitment requirements for relevant vehicle categories under the General Safety Regulation.

The US framework nevertheless provided an important technical reference during the development of the first international EDR requirements.

​

Other international developments

Interest in EDR is increasing globally.

The development of connected vehicles, advanced driver assistance systems and automated driving technologies is increasing the importance of reliable information about vehicle behaviour and system operation.

Countries outside Europe are also considering or developing requirements relating to:

• crash data recording

• vehicle event information

• automated driving data

• location and operational information

• commercial and heavy-duty vehicle monitoring

International harmonisation will remain important because vehicle manufacturers operate in a global market.

​

24. THE FUTURE OF EDR

The introduction of EDR requirements in Europe is not the end of the development process.

Vehicle technology continues to change.

Future EDR development may need to address:

• automated driving

• driver assistance systems

• software-defined vehicles

• cybersecurity

• remote data access

• data survivability

• electric vehicles

• connected vehicle systems

• standardised data retrieval

• access for accident investigators

• interaction between EDR and DSSAD

One of the most important challenges will remain the balance between:

privacy, cybersecurity and the practical availability of data for legitimate accident investigation and road safety research.

For EDR to contribute effectively to road safety, the recorded information must be reliable, protected and sufficiently accessible for authorised and legally justified purposes.

​​​​​​​​​​

CONCLUSION

The development of EDR in Europe has taken more than two decades.

What began with research projects such as VERONICA developed through practical accident investigation, European stakeholder initiatives, technical studies and international regulatory cooperation.

The adoption of Regulation (EU) 2019/2144 established the legal basis for mandatory EDR requirements. UN Regulation No. 160 provided the international technical framework for passenger cars and light-duty vehicles, while UN Regulation No. 169 established the corresponding framework for heavy-duty vehicles.

Today, EDR is part of the European vehicle safety framework.

For passenger cars and light-duty vehicles, the requirements are already in practical application. For trucks and buses, implementation is now progressing towards the 2026 and 2029 milestones.

The next stage of development will increasingly focus on connected and automated vehicles, cybersecurity, data access and the relationship between privacy protection and the legitimate use of technical crash information.

EDR has developed from a specialised accident investigation tool into an integral part of modern vehicle safety regulation. Its future value will depend not only on what vehicles record, but also on how recorded information can be protected, accessed and used to improve accident investigation and road safety.

​

25. TIMELINE OF EDR DEVELOPMENT IN EUROPE