Die Effekte des kombinierten Einsatzes von CACC und GLOSA auf den Straßenverkehr im Linzer Raum

  • Calvin Leon Clausnitzer

Student thesis: Master's Thesis

Abstract

The growing challenges posed by increasing traffic volumes in urban areas, such as longer travel times, more frequent stop-and-go traffic, and higher energy consumption, require new solutions. Innovative technologies such as Cooperative Adaptive Cruise Control (CACC) and Green Light Optimal Speed Advisory (GLOSA), which are part of the Cooperative Intelligent Transportation System (C-ITS), could help solve these problems. These technologies promise to significantly improve traffic efficiency by connecting vehicles and adjusting their speed to stabilize traffic flow and avoid unnecessary stops at traffic lights. This would increase average travel speeds while reducing emissions by minimizing braking and acceleration. These technologies have largely been studied in isolation, with little research into their combined use. This thesis studies both the isolated and combined use of CACC and GLOSA in urban traffic in Linz, Upper Austria and its immediate surroundings. First, the technological basics and the state of research of both systems are discussed. In the practical part of the thesis, different traffic scenarios in the area of Linz are analyzed with the simulation software SUMO. For this purpose, routes were chosen that represent different traffic patterns, speeds and infrastructures. The simulations are carried out several times with different penetration rates of the technologies in order to determine their effectiveness within different introduction periods. The simulation results show that CACC achieves significant efficiency gains, especially in less complex, non-urban environments. In urban areas with high traffic light density, the combination of CACC and GLOSA shows a slight superiority in terms of traffic efficiency and CO2 emission reduction. It was found that electric vehicles benefited particularly strongly from the harmonizing effects of these technologies as they were able to reduce their electricity consumption significantly more than gasoline/diesel vehicles. The results show that the implementation of CACC and GLOSA can make an important contribution to improving urban mobility and reducing emissions. On the routes studied, CACC was more involved in the positive effects than GLOSA. The slower inner-city traffic with high traffic and traffic light density showed significant savings in total travel time and CO2 emissions even at low penetration rates.
Date of Award2024
Original languageGerman (Austria)
SupervisorMatthias Neubauer (Supervisor)

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