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, while also promoting economic growth and environmental sustainability. The DOT is divided into several administrations, each focusing on specific modes of transportation. For example, the Federal Aviation Administration (FAA) regulates air travel, while the Federal Highway Administration (FHWA) manages roadways. By coordinating these efforts, the DOT works to improve infrastructure and enhance mobility across the country.