The CHORUS project

The CHORUS project aims to enable the safe, efficient, and sustainable integration of Cooperative, Connected and Automated Mobility (CCAM) in mixed traffic environments by developing and validating a unified multi-actor orchestration framework across Europe.

The CHORUS objectives

Objective 1

Understanding and Governing Multi-Actor Orchestration

CHORUS defines how multiple actors – vehicles, infrastructure, traffic managers, service providers, and users – can be effectively orchestrated in mixed traffic. Through user-centric use cases, operational design domains (ODDs), and governance models, the project establishes the technical, legal, safety, and organisational foundations required for collaborative CCAM ecosystems.
Objective 2

Designing an Open and Scalable Orchestration Architecture

The project develops a modular, multi-layer system architecture based on open standards and interoperable interfaces. This architecture enables cooperative traffic management, secure data sharing, enhanced V2X communication, and effective human–machine interaction, supporting both automated and non-automated vehicles across diverse traffic contexts.
Objective 3

Developing Advanced Traffic and Mobility Services

CHORUS delivers AI-driven tools, services, and applications for traffic and mobility management. These solutions support smart routing, coordinated vehicle functions, demand- and capacity-aware strategies, and multimodal mobility services, empowering operators and users to make better decisions in complex mixed traffic environments.
Objective 4

Large-Scale Demonstration, Validation, and Upscaling

The project implements and validates its solutions through seven real-life European demonstrators. Using simulation, modelling, and real-world data, CHORUS evaluates performance, safety, environmental, and socio-economic impacts, and develops methodologies to upscale orchestration frameworks to larger CCAM ecosystems.
Objective 5

Enabling Adoption through Policy, Skills, and Market Uptake

CHORUS accelerates CCAM deployment by supporting policy and standardisation efforts, building stakeholder capacity, fostering a Community of Practice, and defining sustainable business and exploitation models. Strategic communication and training activities ensure long-term impact beyond the project lifetime.

The CHORUS solution

CHORUS tackles these challenges by introducing a unified, multi-actor orchestration framework designed to make mixed traffic safer, smarter, and more efficient. Building on existing infrastructure and previous R&I projects, CHORUS creates a scalable architecture that enables seamless communication and coordination across all transport modes.

The project deploys its solutions in seven real-world demonstration sites, delivering:

CHORUS Project

Integrated multi-modal mobility: Smoother coordination between automated and conventional vehicles, public transport, cyclists, and pedestrians.

CHORUS Project

Enable data-driven, AI-enabled traffic management systems that allow for active data exchange in a secure and collaborative environment, supporting real-time decision-making for traffic management and AVs operation, and reducing traffic inefficiencies.

CHORUS Project

Enhance the user experience through personalized travel recommendations and real-time updates, empowering users to make informed transportation choices.

CHORUS Project

Promote innovation by encouraging collaboration between public and private sectors at both governance and operational levels, driving technological advancements within the CCAM landscape.

CHORUS Project

Assist cities in effectively reducing traffic congestion and its associated costs while improving overall mobility efficiency, thereby contributing to European sustainability and climate goals.

By harmonising actors, technologies, and data, CHORUS helps cities optimise mobility, cut congestion costs, improve safety, and advance climate and sustainability goals—moving urban transport closer to a true Social Optimum.

 

Project Outputs

CHORUS will deliver a set of integrated results that enable effective multi-actor orchestration in mixed traffic, supporting the safe, scalable, and interoperable deployment of CCAM solutions through advanced architectures, services, real-world validation, and strong stakeholder engagement.
1

Integrated Use Cases, ODDs and Governance for Multi-Actor Orchestration

CHORUS delivers integrated multimodal use case specifications and orchestration strategies, clearly defined Operational Design Domains (ODDs), consolidated legal and safety compliance analyses, evaluation frameworks, and robust co-designed governance models enabling coordinated multi-actor operation in mixed traffic environments.
2

Open Multi-Layer CCAM Orchestration Architecture and Data Infrastructure

The project provides a complete CHORUS multi-layer system architecture, supported by a C-ITS framework, secure and scalable shared data infrastructure, extended dynamic ODD elements for SAE L2–L4 automation, advanced HMIs and handover strategies, and an innovative simulation-based decision-support framework.
3

AI-Driven Traffic Management and Multimodal Mobility Service

CHORUS delivers integrated multimodal use case specifications and orchestration strategies, clearly defined Operational Design Domains (ODDs), consolidated legal and safety compliance analyses, evaluation frameworks, and robust co-designed governance models enabling coordinated multi-actor operation in mixed traffic environments.
4

Validated CCAM Ecosystem Demonstrations and Upscaling Methodologies

The project produces verified subsystems and demonstrator readiness assessments, implementation plans for real-life deployments, validated CCAM ecosystem performance results, scalable upscaling methodologies, and comprehensive impact and evaluation outcomes based on real-world testing and data analysis.
5

Communication, Capacity Building and Market Uptake for CCAM

CHORUS delivers structured dissemination and communication activities, training and capacity-building toolsets, an active Community of Practice, standardisation and policy recommendations, and commercial exploitation plans supporting the sustainable adoption of CCAM solutions in mixed traffic environments.

The CHORUS Community of Practice

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