The Department of Transportation (DOT) is a government agency responsible for overseeing the nation's transportation systems. This includes highways, railroads, air travel, and public transit. The DOT aims to ensure safe, efficient, and accessible transportation for all citizens. It develops policies, provides funding, and regulates transportation services to improve infrastructure and promote economic growth. The DOT is divided into several administrations, each focusing on specific modes of transportation. For example, the Federal Aviation Administration (FAA) manages air travel, while the Federal Highway Administration (FHWA) oversees roadways. Together, these agencies work to enhance the overall transportation network in the United States.