InterCor
Description
InterCor is a high-level system that supports interoperability between hybrid communication solutions that exist or are under development in the participating countries. This system description includes two interfaces that need to be specified to realize cross-border interoperability. The first interface (called IF1) is the ITS-G5 interface between vehicles and road side systems. The second interface (called IF2) is an interface between back-office systems, to support the exchange of the information between back-offices required to support the services (also) via cellular communication.
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InterCor
Objectives
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Aim at providing service interoperability between implementations from the different participating countries (Netherlands, France, Belgium and United Kingdom)
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To achieve a sustainable network of corridors providing continuity of the C-ITS services and offering a testbed for beyond Day-One C-ITS service development.
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Enable vehicles and road infrastructure to communicate through cellular, ITS-G5 or both.
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Project Status
Ongoing (1 September 2016 - 31st August 2019)
CONTACT
Participants
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Department of Transport Great Britain
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I-Fret
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ERTICO
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Ifsttar
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Flanders
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MGI
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Geoloc Systems
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Télécom ParisTech
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Province Noord-Brabant
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Tass International
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Province Utrecht
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Ministry of Ecology France
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University of Reims Champagne-Ardenne
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Sanef
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University of Valenciennes and Hainaut-Cambresis
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IDnomic
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Inputs
In vehicle Infrastructure
Different varieties as per native ITS sector
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Roadside and Other Infrastructure
A large portion of the Dutch highways is equipped with a fixed, gantry-based, signalling system (nationwide 40%). This system, called MTM2, operates with centrally controlled variable message signs (MSIs) on gantries. The gantries are spaced at approximately 800 meters. The system uses loop detectors in every lane every 400 meters (average). The system is actively used to facilitate road works. Red crosses, preceded by an arrow on the upstream gantry, denote the unavailability of a lane. Over 75% of the route of the Dutch Cooperative ITS Corridor project has MTM2 signals. If there is no MTM2 signalling then road works are normally indicated by temporary signalling gantries (MRS).
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Data Processing Hub
Dutch traffic data is collected, combined and distributed via a dedicated organization called the National Data Warehouse for Traffic Information (NDW). The NDW is the (main) single-point-of-access for traffic data. Speed, travel time and intensity are the primary traffic parameters. At present, the data flow measured by the vehicle or a mobile device (floating car data) is not included in the NDW dataset.
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Communication Protocol
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4G LTE
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DSRC ETSI G5
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Messaging Protocols
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Architecture
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The interfaces required to realize service interoperability as depicted by the thick black lines in Figure 2 are:
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IF1: ITS-G5 air interface - IF1 is the air interface on the ITS-G5 channel which is specified in InterCor activity 2.1a, based on existing European standards and profiles. To support authenticated message exchange, also the PKI solutions needs to be integrated over the different countries, which are being developed in activity 2.1c.
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IF2: Back-office interface: IF2 is an interface between the back-offices to exchange information relevant for the service delivery via the cellular network. It could be implemented by either the service provider backend, the data provisioning, and/or the traffic management. The diagram illustrates that IF2 can be implemented by all central components, but it is not required that this is actually implemented by all components simultaneously: all relevant data needs to be disclosed at least at one location.
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IF3: Cellular interface: IF3 is the interface between the end-device and back-office on the cellular link. Any of the back-office systems could be used to connect via IF3 to the end user systems.
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Achievements/Benifits
Main results of the first TESTFEST:
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Successful operation and testing of the services within complex scenarios and during live road works
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Identification of remaining gaps to be closed in the common specifications for ITS-G5
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Collected valuable data sets for further analysis and evaluation
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Strengthened international public-private cooperation
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Established solid foundations for the next three InterCor TESTFESTs to develop upon
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Gained valuable input for the C-Roads specifications by validating the InterCor common specifications
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ITS G5 Test-Fest for Interoperability
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PKI Test-Fest for data security
Services Provided
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In-Vehicle Signage (IVS): IVS service provides receiving ITS stations the service to inform drivers about static as well as dynamic road signs and variable message signs.
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Road Works Warning (RWW): In this service, the road operator can send information about road works, restrictions, traffic instructions, etc. through the road-side units to the vehicles.
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Green Light Optimal Speed Advisory (GLOSA): In this service, vehicles approaching a traffic light receive information about the topology of the intersection and the phase schedule of each traffic light signal and calculate the optimal approaching speed.
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Limitations
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Different set of legal constraints in different regions of EU; legal side of service still being figured, limited permission given in Netherlands through bypassing certain legislation for specific test sites and participating users
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Higher latency of 4G LTE service
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DSRC ETSI G5 roadside infrastructure or LTE communication environment is not available everywhere throughout EU