الفهرس 
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Abstract
A historic quarter in an urban area refers to sensitive sites in the city’s heritage and often displays valuable ancient architecture with cultural memorial values. Over the years, many historical areas have seen neglect and uncontrolled changes to keep up with current life requirements. The streets of these historic areas were built many years before automobiles for pedestrian and primitive transportation and as public spaces with open-air markets and outdoor activities. Over time, motorized transport has enlarged significantly due to rapid dynamic economic development. Too many vehicles in an often-limited area historic zone impair mobility and create severe traffic problems due to narrow street widths, lack of street continuity, and insufficient traffic facilities. The sustainable development of mobility in such quarters is a critical process aiming to protect cultural heritage, improve accessibility, ensure safety, encourage new activities, and enhance the environment. Therefore, this thesis aims to present a flexible planning approach with an application framework for sustainable mobility development on historic roads according to its current conditions and situations to precisely define the planning objectives and cover the travel needs of citizens and visitors. The methodology involves a strategy to formulate different planning scenarios. Each can contain several action measures to reach the desired planning objectives. The approach also includes the evaluation of the planning scenarios based on sustainability indicators and application of micro-simulation. In case of inappropriate evaluation results, approach phases allow the modification and re-evaluation of additional measures until deciding an acceptable solution. Since the purpose of the application is only to examine the feasibility and practicality of the proposed approach, the application here is limited to Qasr Ras El-Tin Palace Street, the most famous old main road of the historic El-Gomrok district in Alexandria, as a case study. It is also restricted to just two scenarios, the Do-Nothing scenario (existing situation) and a proposed scenario. The application begins with a comprehensive analysis of the current situation, including street network geometry and its intersections, public and private collective transport systems, and traffic characteristics. A proposed future scenario is then created with the following mobility components: (1) reclassifying the internal street network (local, collector, and main streets) and setting traffic rules for each street class, (2) locating parallel on-street parking, (3) upgrading public transport, (4) replanning streetscape elements, and (5) implementing an appropriate traffic control system. Both planning scenarios (Do-nothing and the proposed scenarios) are evaluated firstly using the PTV-VISSIM microsimulation software and then by comparing the model outputs about the traffic conditions of each of them according to sustainability indicators. VISSIM simulates traffic flows for different planning scenarios on the street section based on a field survey and calculates various traffic characteristics. The evaluation of the two planning scenarios is based on several indicators to determine their impacts on traffic efficiency and to confirm whether the proposed action measures are appropriate and can lead to sustainable mobility development. The indicators include vehicle volumes, average speeds, delay times, level of service, queue lengths, travel times, and environmental emissions. The evaluation illustrates that the proposed scenario can reduce serious traffic conflicts and improve mobility at the study site to make it an attractive place. During the application of the VISSIM phase to the case location, some additionally modified scenarios are recommended for future studies to improve the traffic performance in the historic Kasr Ras El-Teen Palace Street.