1. DITCM Test Site

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• 6 km highway, 2 km urban road & 2 traffic light controllers  

• 20 ITS G5 roadside units (802.11p)

• 56 cameras for real-time vehicle detection and tracking (brown symbols)

• 11 dome cameras (blue symbols)

• 3G Communication (red symbols)

• Integration of your party hardware and software systems or simulations for testing

• It consists of both motorway and urban environment.​

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2. Test fleet:

• Instrumented vehicles with extendable in car platforms

• Vehicles with radar, camera, lidar, DSRC, GPS, 3G.

• Software toolkit to rapidly create and test application software

 

3. Control room:

• Test control and monitoring

• Logging, on-line analysis and evaluation

• Control and test third party communication and application units​

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4. Laboratory testing:

• HIL testing of communication units and Application ECUs (GRACE)

• Indoor laboratory testing of complete vehicle (VEHIL)

• Communication channel emulation.

 

5. Simulation facility:

• Detailed simulation of connected vehicle systems (PreScan)

• Microscopic traffic simulation of intelligent systems on city-sized road networks (ITS Modeller)

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Architecture of test site:

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According to ETSI standards Communication Unit (CU) and Application unit(AU) are the two main components of ITS stations which is considered in the project.

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Two types of ITS stations implemented in this site are:

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• Roadside ITS station: Consists of CU and roadside AU responsible for local applications like single interaction

• Central ITS station: Consists of Central CU and multiple communication units responsible for applications covering larger sections like shockwave traffic jam detection and mitigation

• Both receives information from Sensor fusion platform which includes Video based monitoring system (VBM) providing independent observations of all vehicles on the test site.

• Traffic Control center operates even outside the DITCM test site which is mainly used for information exchange with test sites or service providers.

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Test management center:

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It is responsible for control and management of experiments on the test site. All components in the sensor, communication, and application platforms can all used as part of the system under test, or as part of the independent observation system. It is responsible for logging, control and monitoring, and analysis of the information. The most important sources of information are VBM system and V2I messages transmitted by cooperative vehicles.

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Data logging system:

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The component whose data has to be logged can define its own data structure and provide the actual data to the logging facility.

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Three modes of data logging are supported:

• High performance mode: used by components directly connected via fiber network

• High reliability mode: used by test vehicles connected via 2-3G

• An off-line mode: Data is collected first, possibly in another data format, and then imported to logging  system.

 

Facilities on the application units:

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• Local Dynamic map (LDM) is the central component in the facilities layer of the ITS reference architecture which facilitates for collecting all relevant, real time data. Dynamap is one of the implementation of LDM. It combines all the collected information and three consistent views are generated: a road users view(vehicles, trucks, etc.), a traffic view (traffic flows and densities), and an event view (traffic jam, slow moving vehicles ,etc.).

• Based in the BTP (basic transport protocol) port number of the specific message type, the communication provider subscribes itself with the CU for every type of message that is relevant for the applications on the AU. Message manager ensures encoding and decoding of these messages. Different versions of the same message are handled by different message managers.

• Applications are implemented based on the information provided by the Dynamap. Several applications have been implemented on the application platform, including traffic jam detection and mitigation, green light optimum speed advise(GLOSA)

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DITCM can be effectively utilized for testing in below application fields:

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1. Safety:

• Hazardous vehicle warning

• Emergency brake light warning

• Slow vehicle warning

• CACC

• Incident warning

• Road works warning

• Traffic Jam ahead warning

• Red light violation warning

 

 

2. Traffic flow:

• Merging assistant with CACC

• Shockwave damping via speed advise

• Green light optimal speed advice (GLOSA)

• Green wave via speed advice

• Stopping behaviour optimization

 

3. Navigation applications:

• Rerouting

• Intermodal route planner

• Eco route planner

• EV charging Point planner

• Smart parking assistant

 

4. Others:

• Vehicle to vehicle applications

• Vehicle to infrastructure

 

Use of DITCM in different projects:

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Within the project DITCM acts as the so-called System Test Site (STS) where the full DRIVE C2X reference system is installed. This allows the partners to test and validate the different DRIVE C2X applications on a single test site before these are deployed on the other six test sites where the Field Operational Tests take place. Basic technologies like timing, accuracy, communication distance and localization quality has been evaluated along with performance of safety related and traffic management related applications.

In the SPITS project, RSU cooperated with a low percentage of vehicles equipped with a CACC or an advisory system. RSU continuously monitored all vehicles and communicated traffic information to the equipped vehicles. When the RSU detected a shockwave, speed advice messages were sent to the equipped vehicles to damp the shockwaves.

Field operational test has been designed, implemented and executed in which participants were provided in car speed advice. The impact of this on traffic flow and environmental impact of the mobility system has been determined. The test site has been used to detect the traffic state, speed advice and provide this advice to vehicles via ITS G5.

Having a single STS where all OEMs can perform their tests also allows to perform combined tests in order to ensure interoperability. Other important projects in which this facility was used includes GCDC, eCoMove etc.

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Outcomes:

• The flexibility to adapt to specific project requirements and the possibility to use the same test site for open track and closed track tests make it unique and more suitable for rapid and flexible technical validation testing.

• Multiple projects can run simultaneously, each with their own versions of message set, communication or application units or hardware.

• Test management systems provide real time data and feedback on test results and control immediately by continuously logging the road side and vehicle data.

• The vehicles trajectories logged in normal traffic and in experiments on the DITCM test site provide ample data to develop realistic driver models.

• Driver behavior, safety margins and measures, tracking the movements of all traffic in real time for both normal and equipped vehicles by roadside systems, VBM systems which continuously monitor the communication of all ITS stations.

 

Impact of smart mobility in highways and in cities results in:

• Less traffic jams (50% reduction in traffic congestion) and accidents has resulted in 1 billion euro savings

• New mobility market has created a employment opportunity

• Accidents have been reduced by 20%

• CO2 emission has been reduced by 20%

• 20% better traffic flows on roads