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TY  - THES
AU  - Henke, Antonia Caroline
TI  - Sustainability potentials of corporate mobility as a service systems
PB  - Rheinisch-Westfälische Technische Hochschule Aachen
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2025-06213
SP  - 1 Online-Ressource : Illustrationen
PY  - 2025
N1  - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
N1  - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025
AB  - Corporate Mobility as a Service (CMaaS) emerges as a promising approach to address the sustainability challenges associated with company-related mobility. Since corporate cars make up a significant share of the German vehicle fleet and contribute heavily to mobility-related damages, e.g., greenhouse gas (GHG) emissions, noise, air pollution, and congestion, current mobility practices in companies are often at odds with environmental and social sustainability goals. Despite increasing awareness of these issues, most companies still rely on exclusive, unimodal car fleets. CMaaS combines the benefits of exclusive mobility services, e.g., owned or leased cars, with public mobility services, e.g., bikesharing or taxis. While exclusive mobility services provide flexibility and reliability, public mobility services can help to cover the mobility demand during peak hours. Since CMaaS decreases the dependence on cars and provides low-emitting modes, e.g., electric cars, bikes, and scooters, it is expected to decrease the negative environmental and social impacts of corporate mobility. Against this background, the aim of this dissertation is to contribute to the limited literature on CMaaS, provide decision support for integrating multiple mobility services with different technical characteristics and cost structures, and quantify the sustainability potentials of CMaaS. By creating general insights about the potentials of CMaaS to reduce the negative economic, environmental, and social impacts of corporate mobility, this research supports corporate mobility managers in deciding about the implementation of CMaaS in their companies, and political decision-makers in making better-informed decisions about our future mobility system. This cumulative dissertation contains three research papers, each conducting an assessment in one sustainability dimension. The first research paper develops a tool that helps corporate mobility managers design their customized CMaaS system under a cost objective. It is the first strategic-tactical optimization model that identifies the optimal CMaaS design for a given mobility demand, while considering the relevant decisions for and restrictions of exclusive and public mobility services. Applying the model to a case study, the research paper assesses the cost implications of the determined CMaaS systems and deduces general insights for CMaaS. The second research paper considers the fact that an increasing share of companies is obliged to decrease their GHG emissions. To quantify the GHG emissions of each regarded mobility service, a Life Cycle Assessment (LCA) is conducted that quantifies the life time CO2 equivalents emitted per passenger kilometer. By transforming the decision-support tool into a bi-objective optimization model that minimizes corporate costs and GHG emissions, the trade-off between minimum economic and minimum environmental impacts is assessed. The third research paper quantifies the social impacts of CMaaS, conducting a social cost assessment. Herein, the social burden of corporate mobility is evaluated by comparing the costs that are borne by the individual user (internal costs) with the costs that incur to society due to the mobility behavior of an individual (external costs). The underlying optimization model from the first research paper is adjusted to account for social costs, and new objective functions are implemented to minimize either the internal costs, the external costs, or the sum of both, which are the social costs. To deduce general insights about CMaaS, the methodologies of all three research papers are applied to a comprehensive case study, which is based on trip data of 144 companies in Germany. By comparing the individual internal mobility costs, GHG emissions, and social costs of each company in a traditional setting with unimodal car fleets to an optimized CMaaS setting, the potentials of CMaaS to decrease the sustainability-related impacts of corporate mobility are quantified. Proposing the suitable methodology to analyze the potentials of CMaaS to reduce negative impacts in each dimension of sustainability and applying it to a common, comprehensive case study, this dissertation for the first time provides an integrated approach for the prospective design of CMaaS under economic, environmental, and social objectives, that also serves as decision support for corporate mobility managers.
LB  - PUB:(DE-HGF)11
DO  - DOI:10.18154/RWTH-2025-06213
UR  - https://publications.rwth-aachen.de/record/1015036
ER  -