LOGIN

The internationally coordinated regulatory conversion of radio frequency bands entails the risk that the current analog radio-based communication basis for public transport priority at traffic light systems (LSA) will be lost. Since - irrespective of this - signal programs cannot always guarantee stop-avoiding public transport clearance, especially in the case of competing applications, energy-saving and emission-minimizing driving, which is necessary for climate protection reasons, requires the anticipatory transmission of traffic light switching times to the driving personnel or to the driverless vehicles of the future. Within the scope of this project, both unsolved problems are to be addressed by using V2I communication technologies (Vehicle to Infrastructure) in accordance with the ETSI ITS-G5 and ISO/TS 19091 standards.

As part of the LOGIN project, a modular construction kit is being developed which provides solutions and instruments at all levels involved (planning, design, pilot testing and regular operation) so that LSA and public transport operators can gradually implement the components best suited to their needs and test them under practical conditions. The starting point and target area of the research and development work is the state capital of Hanover and the Hanover region with the public transport companies ÜSTRA and regiobus.

The Department of Traffic Engineering and Transport Logistics at the University of Kassel is pursuing the following goals as part of the LOGIN project:

• An experimental development platform based on a smartphone is to be developed for the realization of C-ITS functions and as an HMI (human-machine interface) to the driver. This will be installed in light rail vehicles and buses and will cover the mobile part of the overall cooperative system.
• Novel signaling and driving strategies are intended to make the best possible use of the potential of V2I communication.
• The quality of the switching time forecast is to be improved by a process for designing forecast-friendly signal programs.
• A simulation-based test environment, in which real devices such as smartphones, roadside units (RSU) and onboard equipment (OBE) are placed in a "loop", is intended to facilitate both software development and the necessary functional tests before use in real road traffic, as well as to enable the analysis of the traffic effects of different signaling and driving strategies.
• An evaluation initially determines the traffic potential based on simulation and then empirically determines the functional and traffic quality of the developed procedures and algorithms as well as the communication performance and stability of the overall system during pilot operation.

As part of the project, a guideline for setting up a C-ITS-based public transport priority system was created.