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Currently, many developed countries have established efficient, convenient, and environmentally friendly urban public transportation systems that can meet the travel needs of different populations. These systems also focus on providing accessible services and utilize smart technologies to enhance operational efficiency. This paper primarily analyzes the management of smart public transportation systems in developed countries such as the United States, Europe, and Japan. Through an analysis of the current status of public transportation abroad, the United States is one of the countries that has successfully implemented Intelligent Transportation Systems (ITS). Currently, ITS applications in the United States have reached over 80%, with advanced products available. The development of ITS applications in the United States is particularly fast in vehicle safety systems (51%), electronic toll collection (37%), highway and vehicle management systems (28%), navigation positioning systems (20%), and commercial vehicle management systems (14%). Europe's progress in ITS applications falls between Japan and the United States. Comprehensive development of Telematics is currently underway with plans to establish a dedicated wireless data communication network for transportation throughout Europe (with a focus on road traffic). Advanced Traveler Information Systems (ATIS), Advanced Vehicle Control Systems (AVCS), Advanced Commercial Vehicle Operations Systems(ACVO), advanced electronic toll collection system are being developed. Japan has received praise for its highly developed public transportation system and is considered one of the best in the world. The railway network covers all parts of Japan including high-speed trains like Shinkansen as well as subway systems within cities."