In an end of pipe system, environmental planning has to mitigate the impacts of infrastructure construction. To reach fundamental reductions of environmental impacts, integration in all levels and programme development stages are necessary. Statistics and prognosis of global impacts of transportation systems can be summarised on a spatial independent level and significantly analysed on a local level. The middle scale level needs spatial categorised data and models but is too large for field investigations. A geological information system (GIS) data base must be developed. For the Stuttgart Region, screening methods to define spatial priorities and evaluation procedures with spatial and temporal comparative analysis are demonstrated. Regional development planning, transportation systems and environment are presented. There are narrow margins to change the existing rail infrastructure network. Margins offer the new constructed housing areas the inter-regional migration and the newcomers from other regions. The inter-regional migration in two years (1994/95) in Stuttgart Region was 421,679 inhabitants from one transportation cell to another, related to 2,7 million of inhabitants, the theoretical turnover rate of the total population is 20 years. This should be, together with the newcomers, a big potential to optimise the allocation of housing to public transportation station. The preferences and realistic assumptions regarding property and energy prices lead to a trend interpolation which goes to further decentralisation between the axes. The percentage of the population in traffic cells with good access to stations will decrease from 62.24 % down to 60.69 % in 2020. Actions which effectively would change the trend are politically not desired or not realistic: energy prices form now 0.80 US dollars to 2.5 US dollars per litre gas, reduction of the road capacity, drastically reduced parking volume, redistribution of the investment to the public transportation system.