Traffic congestion is increasingly becoming a severe problem in many large cities around the world. The problem is more complex in developing countries where cities are growing at a much faster rate than those in the developed world. Advanced Traffic Control Systems (ATCS) are one of the Intelligent Transportation Systems (ITS) technologies that have been recommended and used as a tool to ease congestion problems in many large cities in the developing world. Analysis regarding how specific local conditions commonly observed in these cities affect the performance of these systems, performance comparison between ATCS and Fixed Time Traffic Control Systems usually used in the large cities, and a number of recommended improvements to enhance the performance of ATCS are provided in this book. The results and findings presented in this book are very beneficial for road authorities to determine traffic management policy, for traffic engineers to determine the best practices for the implementation of advanced traffic control systems in their cities, and also for researchers or anyone else who concern about how to reduce traffic congestion.