The chapter discusses the experience of traffic engineering analysis and subsequent transport planning as a comprehensive tool for classifying the suitability of transport design solutions in cities. It will also highlight, on the basis of practical experience, the issue of the interventions of various non-profit organisations, whether for the environment or for alternative modes of transport, who will have to interact professionally and systematically when proposing changes or new solutions for serving the built-up area in cities. The issue mainly affects efforts to develop public transport, the prevailing lack of parking, the suppression of dynamic car traffic, especially in favour of cycling, but all from the point of view of the weakest road transport participant, which are the pedestrians. The public spaces are the relevant issue in a whole line and/or cross section point of view of the road/street. The other important task is the complexity and sustainability of the road/street network in urban areas. The principles focus on the systematic development of sustainable transport in terms of serviceability and accessibility. Distance and time for the functions of land use are crucial parameters and not just some fictional vision of aggressive promotion of one mode of transport at the expense of other modes.