The target of this major-study is the development and evaluation of concrete approaches to integrate the transport sector into a CO2-Emissions-Trading-System. The three approaches, the upstream-approach with fixed emissions target, the midstream-approach with fixed emissions target and the midstream-approach with specific emissions target and inherent gateway-construction, will have to be put in concrete terms by dealing with a list of methodical central questions. Again they will be extensively and conclusively weighted with the specific criteria of the identically worded pre-study (term 8/2000 - 2/2001). The integration of further approaches into the existing regulation frame should be achieved. Whether the three above-mentioned approaches of a CO2-Emissions-Trading-System in transport sector can be integrated into the already existing national regulations (mineral oil tax, automobile tax, eco-tax) is an arising question, that has to be investigated. Furthermore a solution in transition from the present regulation arrangement to a pure Emissions-Trading-System in transport sector is evaluated. The legal and economic arrangements will become a central meaning.