Automotive Intelligent Transport Systems

Intelligent Transport Systems (ITS) include telematics and all types of communications in vehicles, between vehicles (e.g. car-to-car), and between vehicles and fixed locations (e.g. car-to-infrastructure).

The following important topics related to automotive ITS are currently being addressed:

  • Dedicated Short-Range Communications (DSRC)
    DSRC provides communications between the vehicle and the roadside in specific locations (for example toll plazas). Applications such as Electronic Fee Collection (EFC) will operate over DSRC.
  • Cooperative-ITS (C-ITS) and its evolution to support full autonomous driving  including wireless short range communications (ITS-G5) dedicated to automotive ITS and Road Transport and Traffic Telematics (RTTT)
    C-ITS provides connectivity between road participants and infrastructure.
  • Automotive ITS Security
    This includes trust and privacy management and certificate formats.
  • Automotive radar

Cooperative ITS (C-ITS)

We depend heavily on transport in our everyday lives. Yet continuously increasing road traffic generates serious problems in terms of congestion, safety and environmental impact. Fortunately, information and communication technologies offer new advanced solutions to today's transport problems.

Intelligent Transport Systems (ITS) embrace a wide variety of communications-related applications intended to increase travel safety, minimise environmental impact, improve traffic management and maximise the benefits of transportation to both commercial users and the general public.

Stand-alone driver assistance can help drivers to maintain a safe speed and distance, drive within the lane, avoid overtaking in critical situations and safely pass intersections and thus have positive effects on safety and traffic management. However, benefits could be further magnified if individual vehicles were able to continuously communicate with each other or with the road infrastructure.

Over recent years, the emphasis in intelligent vehicle research has turned to Cooperative ITS (C-ITS) in which the vehicles communicate with each other and/or with the infrastructure. C-ITS can greatly increase the quality and reliability of information available about the vehicles, their location and the road environment. It improves existing services and will lead to new ones for the road users, which, in turn, will bring major social and economic benefits and lead to greater transport efficiency and increased safety.

Our ITS committee (TC ITS) is leading the drive to achieve global standards for Co-operative ITS, which offers enormous potential through vehicle-to-vehicle and vehicle-to-roadside communication. Applications include road safety, traffic control, fleet and freight management and location-based services, providing driver assistance and hazard warnings and supporting emergency services.

TC ITS develops standards related to the overall communication architecture, management (including e.g. Decentralized Congestion Control), security as well as the related access layer agnostic protocols: the physical layer (e.g. with ITS-G5), Network Layer, Transport Layer (e.g. with the GeoNetworking protocol), Facility Layer, (e.g. with the definition of facility services such as Cooperative Awareness - CA, Decentralized Environmental Notification - DEN and Cooperative Perception – CP, used by the ITS applications). Other addressed topics include, among other things, platooning, specifications to protect vulnerable road users such as cyclists and motor cycle riders, specifications for Cooperative Adaptive Cruise Control as well as multichannel operation.

For all the above standardization activities, TC ITS develops also conformance test specifications which are crucial for the commercial deployment of the technology.

Finally TC ITS is also heavily involved in the related spectrum requirements.

Cooperative ITS

Most of the ETSI TC ITS standardization work is actually related to Cooperative-ITS (C-ITS). The following is being addressed:

Decentralized Congestion Control (DCC)

Cross layer Decentralized Congestion Control (DCC) provides stability in the ad-hoc network by providing resource management when there are a high number of C-ITS messages in order to avoid interference and degradation of C-ITS applications.

C-ITS Security

C-ITS and safety driving applications depend upon reliable and trustworthy data transmitted by other vehicles and the infrastructure. In this context, standardized solutions for security and privacy are paramount and this will be based on the design and implementation of a security management infrastructure for cooperative-ITS. ETSI TC ITS develops standards defining the security framework for cooperative ITS including a PKI. This security framework will support PKI trust model requirements from the EU C-ITS deployment platform and bring privacy protection mechanisms for users and drivers, e.g. using pseudonym certificates and regularly changing pseudonyms IDs in ITS G5 communications.

GeoNetworking (GN) protocol 

Many ITS applications require the dissemination of information with a rapid and direct communication, which can be achieved by ad hoc networking. GeoNetworking (GN) is a network layer protocol for mobile ad hoc communication without the need for a coordinating infrastructure based on wireless technology, such as ITS-G5. It utilizes geographical positions for dissemination of information and transport of data packets. It offers communication over multiple wireless hops, where nodes in the network forward data packets on behalf of each other to extend the communication range.

C-ITS facility services to be used by ITS Applications

ETSI TC ITS develops and maintains important services to be used by ITS applications. These services include but are not limited to:

  • Cooperative Awareness (CA) to create and maintain awareness of ITS-Ss and to support cooperative performance of vehicles using the road network.
  • Decentralized Environmental Notification (DEN) to alert road users of a detected event using ITS communication technologies.
  • Cooperative Perception (CP) complementing the CA service to specify how an ITS-S can inform other ITS-Ss about the position, dynamics and attributes of detected neighbouring road users and other objects.
  • Multimedia Content Dissemination (MCD) to control the dissemination of information using ITS communication technologies

Other activities linked to C-ITS include platooning, Cooperative Adaptive Cruise Control as well as multichannel operation. 

Who is involved in ITS standardization work?

The work of TC ITS is supported by a large variety of companies that actively contribute to the standardization work. These include main car makers along with automotive supply industry representatives, silicon vendors, network operators as well as test houses.

Intensive links are maintained with the European Commission whose ITS related activities such as the iMobility initiative and the C-ITS Deployment Platform set up in 2014 aim to stimulate the deployment of Cooperative ITS. The European Commission Mandate M/453 in the field of information and communication technologies to support the interoperability of Co-operative Systems for Intelligent Transport in the European Community as well as the recent Mandate M/546 on Intelligent Transport Systems in urban areas stresses this importance.

Due to the international nature of this work the ETSI automotive community cooperates closely with other international standardization organizations such as ISO, CEN, IEEE, SAE, ARIB, TTA, IETF and ITU in order to achieve internationally deployed and harmonised standards on ITS, essential to achieve worldwide interoperability.

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The following is a list of the 20 latest published ETSI standards on intelligent transport systems.

A full list of related standards in the public domain is accessible via the ETSI standards search. Via this interface you can also subscribe for alerts on updates of ETSI standards.

For work in progress see the ETSI Work Programme on the Portal.

Standard No. Standard title.
TS 102 894-2 Intelligent Transport Systems (ITS); Users and applications requirements; Part 2: Applications and facilities layer common data dictionary
TS 103 301 Intelligent Transport Systems (ITS); Vehicular Communications; Basic Set of Applications; Facilities layer protocols and communication requirements for infrastructure services
TS 103 248 Intelligent Transport Systems (ITS); GeoNetworking; Port Numbers for the Basic Transport Protocol (BTP)
TS 101 539-2 Intelligent Transport Systems (ITS); V2X Applications; Part 2: Intersection Collision Risk Warning (ICRW) application requirements specification
TS 102 941 Intelligent Transport Systems (ITS); Security; Trust and Privacy Management
TR 103 415 Intelligent Transport Systems (ITS); Security; Pre-standardization study on pseudonym change management
TS 102 687 Intelligent Transport Systems (ITS); Decentralized Congestion Control Mechanisms for Intelligent Transport Systems operating in the 5 GHz range; Access layer part
TS 102 940 Intelligent Transport Systems (ITS); Security; ITS communications security architecture and security management
EN 300 674-2-2 Transport and Traffic Telematics (TTT); Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s / 250 kbit/s) operating in the 5 795 MHz to 5 815 MHz frequency band; Part 2: Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU; Sub-part 2: On-Board Units (OBU)
TS 103 097 Intelligent Transport Systems (ITS); Security; Security header and certificate formats
TS 103 544-1 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 1: Connectivity
TS 103 544-10 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 10: UPnP Client Profile Service
TS 103 544-11 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 11: UPnP Notification Server Service
TS 103 544-12 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 12: UPnP Server Device
TS 103 544-13 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 13: Core Architecture
TS 103 544-14 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 14: Application Certificates
TS 103 544-15 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 15: Application Programming Interface (API) Level 1 & 2
TS 103 544-16 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 16: Application Developer Certificates
TS 103 544-17 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 17: MirrorLink over Wi-Fi Display (WFD)
TS 103 544-18 Publicly Available Specification (PAS); Intelligent Transport Systems (ITS); MirrorLink; Part 18: IEEE 802.11TM Car Connectivity Consortium (CCC) Information Element