Tim Ruß’s scientific contributions

The research project BiDiMoVe in the city of Hamburg utilizes V2X to exchange data between infrastructure (thermal cameras, traffic lights) and metrobuses. This paper covers one of the core use cases of the project, the collision protection of VRUs like cyclists. Thermal cameras detect VRUs and generate V2X messages which are received and computed by on-board units on selected busses. The probability of collisions on the next intersections will be calculated and, if necessary, the driver will be informed. This paper presents the system's architecture, the collision prediction algorithm as well as technical and organisational challenges.

A large amount of present green light optimal speed advisory (GLOSA) systems are for private vehicles. However, as one of nonnegligible transportation modes, public transportation is worth more attention. Some GLOSAs just provide several driving models with fixed speeds and accelerations which is extremely difficult for human-drivers to obey strictly and adapt dynamically. Therefore, this paper proposes a GLOSA for buses (GLOSA-B) considering the waiting time at the closest bus stop to the target intersection. By means of V2X communication based on ITS-G5 (IEEE 802.11p), this GLOSA-B could provide a range of recommended speeds and update calculation every second. To validate the proposed algorithm, 20 groups of GLOSA and non-GLOSA buses are simulated. The results indicate that this GLOSA-B could avoid unnecessary stops significantly. Compared with non-GLOSA buses, the GLOSA buses save waiting time at the target intersection by 98.95%.