User Report

In one of the world's biggest fleet test trials starting today 120 cars on Hessian streets as they can communicate with each other and with the environment. Scientists, businesses and public institutions have developed the "Sim TD" system with which vehicles each other informed about the traffic situation and imminent dangers. Researchers at the Technische Universitaet Muenchen (TUM) have developed the relevant scenarios for the experiment and analyze the data.

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Choose the best route. Perceive obstacles, before you see them. Efficient driving and reduce pollution. These are the objectives of the research project "Safe Intelligent Mobility - Test Field Germany (Sim TD)". They are to be achieved through the electronic network between vehicles and the infrastructure, the so-called Car-to-car and car-to-x communication. How this is achieved in practice by the consortium developed TD-Sim system 120 test cars for several months on freeways, highways and urban roads in the Frankfurt region.

Green wave detected early

Firstly, send the vehicles information about traffic conditions to a central station, which then predicts the development of transportation and controls. Get the driver via a display recommendations on best route. The system also assists the drivers at intersections or traffic lights by about the optimal speed for a "green wave" indicates prematurely.

Secondly, the system informs the driver about potential hazards. For example, a warning on the display Notbremslicht the driver when a forward driving car brakes sharply - even before the driver is physically unable to detect the situation itself. During rescue operations, the system displays the direction and track from which often come and difficult to find emergency vehicles. Are obstacles on the road, such as lost cargo, the driver get early alternatives displayed.

Special radio technology

The sim TD system uses a proprietary wireless technology that is based on the WLAN standard. Information can be sent directly to other vehicles or stations installed along the roadway. In the event that the communication partner is not in the direct transmission range, other vehicles transmit information store (multi-hopping) and forward or (store and forward).

Which formations, at what times, have to drive on the routes which the individual test fleet of vehicles in order to get meaningful results: why have the scientists at the TU Munich care. Not only is the preparation of the field test, but also the analysis of the huge amount of data is much in their hands. "We study how drivers accept this technology in everyday life and to what extent we can increase traffic safety and avoid traffic jams", Prof. Fritz Busch says the TUM Department for Transport Technology. The scientists also simulate the impact the introduction of the technology would have on the overall transport in the test area to be if certain numbers of cars equipped with it would.

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