The National Transit Database (NTD) is a comprehensive source of information about public transportation in the United States. It collects data from various transit agencies, including information on ridership, service performance, and financial statistics. This database helps policymakers, researchers, and transit agencies understand trends and improve public transportation services. Established by the Federal Transit Administration (FTA), the NTD aims to enhance the quality and efficiency of transit systems. By providing standardized data, it supports informed decision-making and helps allocate federal funding to transit projects. The NTD is essential for promoting transparency and accountability in public transportation.