The governorates of Cairo and Giza are considered one of the largest areas of the Arab Republic of Egypt which contain large numbers of bridges that link urban areas with each other. It is one of the important traffic arteries for solving traffic jam problems as a result lack of awareness to optimize these careless areas, they have become careless urban areas, dark and very dangerous places to collect garbage and wastes, also Places crime, spread Drugs, informal parking, and finally transgresses from street vendors. The research aims to optimize these careless areas (Under the upper bridges) and make it as development model applied to all upper bridges in Egypt, by identifying Urban Public Spaces ،
Universal Design and studying global and local similar projects also analysing them and coming up with most important design advantages of study criteria necessary for success of projects to optimize public spaces under the upper bridges and applying them on regions studying.