Sustainable urban development is based on ensuring energy efficiency, improving local transport, improving urban air quality, protecting and expanding urban green areas and reducing noise pollution. Many green areas, cycle paths connecting the settlement, as well as urban development plans that place people in the centre are needed in order for the city of Győr to be a liveable city. The central core of European cities, including Győr, has been formed in a long process of centuries and fulfils many tasks. Here you can find municipal, administrative institutions, museums, theatres, many smaller or larger shops, banks, hotels and restaurants, and in addition to these, there are usually a significant number of apartments. It follows from the multifaceted features that the streets of a “good” city centre, its squares are full of life both day and evening, people walk, use the services, meet each other or look rested on a bench. This can often be done in attractive historical or landscaped green environments. At the same time, people want to get to downtown, quickly, comfortably, preferably by car, and they want to stop the car near their target. This requires space, a lot of cars, and the available parking area is narrow due to the downtown nature. The two types of demand — the liveable street and the motorist — are at odds with each other. This is not a conflict between two types of people (car and pedestrian), since the driver is also out and becomes a pedestrian, but a contradiction between the two demands of the city dwellers. It is the responsibility of the municipal government to resolve, manage and balance this. The city structure of the Győr City is centrally located, and the established road network system is such that both the target and transit traffic affects or passes through the city centre. The city centre cannot be accessed due to structural and network deficiencies. The downtown road network has a narrow, densely crossed system due to the installation of the earlier centuries, so there is no possibility of a higher proportion of traffic development. The location of institutions, shops and department stores, entertainment and catering facilities and administrative and cultural institutions that attract the crowds creates a concentrated need for travel. Public areas of the city centre were saturated by the mid-2000s due to target traffic and packing. This saturation process has become a barrier to the development of the road network and has spread to the surrounding districts due to the expansion of the city centre and function. By the mid-2000s, the traffic of Győr’s Belváros became chaoticly overloaded. Traffic on the outskirts of the city centre cannot be stopped, so traffic searching for internal parking was paralysing on the traffic of the city. The existing parking tension has pushed the downtown frames apart. The existing squares of the city centre were not connected by pedestrian zones, there were few indoor green spaces, little attraction in the city center. The presence of large articulated buses in the city centre was a barrier to traffic rather than helping to serve the travelling public. The traffic of the city centre had to be radically redesigned in order to be able to severely limit car traffic in the city centre and to develop a liveable, attractive city centre. The essence of this is to exclude all or part of transit traffic, but traffic should approach the centre only in a tangent way (due to the demand for the supply of goods in the city centre, it is not possible to completely ban car traffic, but it is possible to limit traffic heavily and to tighten the limits). The transformation, which started in the mid-2000s, is still ongoing and includes the following main activities: • the realisation of investments aimed at relieving the roads of the city centre (the most important investments made so far: Construction and conversion of Jedlik bridge and associated streets; construction of a new bridge in Pimelon (Olimpia Bridge), construction of the Nádor underpass, conversion of the main road no. 14 of Árkád shopping centre, etc. • extension of pedestrian zone, creation of a closed zone • creation of unidirectionalisations, thus making road connections “unfavourable” for drivers • changing the traffic order of side streets in order to allow only target traffic and parking • development of parking infrastructure (so far, 2 parking houses and 1 underground garage have been completed with municipal funding in the last 10 years, with a capacity of more than 750 seats) • partly new public transport routes • rethinking cycling traffic in the city centre, designing new trails, increasing bicycle storage capacity • Establishing a fixed-collected public transport system for cyclists (GyőrBike) The objective of this project is to make the city centre of Győr more liveable with sustainable transport development interventions, noise and air pollution from transport