Our recent recognition of the consequences of greenhouse gas emissions and the emergence of global warming' as an issue have had a dramatic impact oil our perceptions of the ecological role we human beings play. The decommissioning of existing nuclear installations in developed economies and an equitable rise in the material standard of living in other countries will together require a reduction in current carbon dioxide emissions from the transport sector in industrialized countries by as Much as a factor often. It is highly doubtful whether automotive transport will be able to free itself from reliance oil fossil fuels within the span of the few decades we have at our disposal. Only if we manage to devise new, environmentally sustainable transport solutions - in lime - can we hope to avoid what failure to achieve this goal may entail. Such solutions will have to do more than simply ensure that the engines use new fuels more efficiently. They must also reduce the number of engines ill operation ill relation to the total need of mobility, since the number of engines in the world is growing too fast Consequently we need new solutions in public transport within the micro-region, where the use of engines is most frequent. The purpose of the study is to explore the possibilities of stimulating socioeconomic development by adapting means of transport ill micro_regions to the constraints imposed by environmental concerns The task is complex and necessarily involves numerous disciplines and interconnected areas of inquiry. Taking the versatility of flexible vehicles - multimobiles - as a means to develop public transportation on local and regional levels as a working hypothesis, the study explores how such vehicles might be designed. The multimobiles design features have been specified in cognizance of new directions in which design theory should be developed to respond to the requirements posed by the need to attain sustainability. Specifying the requirements which a variety of common urban and built up structures make of transport systems in an integral, non-reductionist manner makes it possible to design a 'family of vehicles'. This product family, comprising some dozen complementary types of vehicles, can be constructed of no more than a handful of modules in a 'vehicle construction kit'.The contents of the kit are then applied to three different demo_geographical contexts: sparsely populated rural areas, all urban network consisting of small towns (the Falun-Borlaenge region), and an urban centre (Uppsala). The vehicles produced from the kit are evaluated in terms of their ecological, economic, social and cultural benefits and impacts. Finally, the study explores the possibility of furtiler user-steered product development, assuming that local can influence the design characteristics and performance of public transportation vehicles in accordance with the commitment to achieve environmental sustainability.