Under conditions of sustainable development, we prefer accessibility rather then mobility in the city. Although, mobility is neccessary, of course, so we prefer alternative means of transport first, like pedestrian access and cycling. If it is not acceptable for some groups of users, or distance is too long, the next stage is public transport system. So, downtown investment area should be operated by suitable mean of transport. 

In order to make walking or cycling work, there must be an adequate system of useful links within the area as well as externally. A useful public transport system should provide for adequate vehicle frequency and attractiveness of connections and the availability of stops within a walking distance of no more than 400-500 m. There is, of course, a need to equip the development areas with infrastructure to serve individual cars, in particular parking spaces. It is nowadays assumed that each dwelling will have a parking space. To this must be added spaces for visitors’ cars. This gives approximately 1.1-1.3 parking spaces statistically per 1 dwelling. However, with regard to inner-city areas, municipal authorities are increasingly implementing a policy of restricting car entry and parking space availability. Therefore, parking space ratios of 0.7 or even less per dwelling can be adopted for downtown city areas. In the most progressive cities, like Berlin or Vienna, there are many initiatives to reduce level of using individual cars, like habitable communities free from cars.