The public urban open spaces – especially that at the Central Business Districts of cities - are the main distinguishing features of the city which considered as a container for people's activities, and a source of vitality, vibrant and joy. It is also an important economic source for many cities over the eras, so the managements of modern cities have been concerned with these spaces that attract citizens and tourists and represent a direct and indirect source of many economical, environmental and social benefits. However, since the beginning of the era of cars and their participation with people in the public spaces, they have become a source of danger to people's safety, their activities and their environment. , So it has been decided – By the administrations of several cities- to ban the vehicles - in varying policies - away from the public spaces and replace the spaces they take with activities for the people, which restored the city to its splendor and image to achieve several benefits. Cairo and the other big Egyptian cities can benefit from this car banning policies and achieve many gains, the most important of which are the economic benefits which can be an important of renewable sources of Egyptian national income, reviving tourism and improving the environment and public health, in the other hand it will not be easy for the Egyptian managing to ban cars, and convert (UOSs) to pedestrian totally in one step, then the research will suggest the proper model for banning cars from Cairo's center.