The main topics of this diploma thesis are the environmental and economic evaluation of alternative mobility concepts. The increasing demand for personal mobility is challenging the energy base and the environmental sustainability of our transportation system.Focusing on individual means of motorised transportation, alternatives to our current fossil fuel based transportation system are evaluated.Following the mainstream of climate research, the practical significance of global warming is not being challenged. The focus thus lies on the means of mitigation and adaptation using technical and institutional mobility alternatives.The evaluated low carbon technologies are characterised by significant reductions of energy intensity and lower levels of greenhouse gas emissions than the contemporary personal transportation system.Hybrid Vehicles, Plug-in-Hybrid Vehicles, Electric Vehicles, Multimodality (combination of individual and public transportation), Superethanol (E85), Biodiesel (B100) and Compressed Natural Gas (CNG) as alternative fossil fuel constitute the set of available technologies which are evaluated. Using the wedge methodology formulated by Pacala and Socolow (2004) the environmental potentials of these technologies are compared in an Austrian framework.(Hybrid) electric propulsion systems, both exclusively and in combination with existing means of public transportation (multimodality), are shown to have a high potential to reduce greenhouse gas emissions in the transportation sector although at significant costs.E85, B100 and CNG promise an inexpensive way of improving the environmental impact of personal mobility. Questions of sustainability arise in the light of their limited capability of significantly reducing green house gas emissions and the utilization of energy.Extended research, political and financial support of these mobility alternatives are of great importance, for they are economically and environmentally beneficial to society.